1.
Conservation status
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The conservation status of a group of organisms indicates whether the group still exists and how likely the group is to become extinct in the near future. Various systems of conservation status exist and are in use at international, multi-country, the IUCN Red List of Threatened Species is the best known worldwide conservation status listing and ranking system. Also included are species that have gone extinct since 500 AD, when discussing the IUCN Red List, the official term threatened is a grouping of three categories, critically endangered, endangered, and vulnerable. Widespread and abundant taxa are included in this category, Data deficient – Not enough data to make an assessment of its risk of extinction Not evaluated – Has not yet been evaluated against the criteria. The Convention on International Trade in Endangered Species of Wild Fauna and Flora aims to ensure that trade in specimens of wild animals. Many countries require CITES permits when importing plants and animals listed on CITES, in the European Union, the Birds and Habitats Directives are the legal instruments that evaluate the conservation status within the EU of species and habitats. NatureServe conservation status focuses on Latin America, United States, Canada, and it has been developed by scientists from NatureServe, The Nature Conservancy, and the network of natural heritage programs and data centers. It is increasingly integrated with the IUCN Red List system and its categories for species include, presumed extinct, possibly extinct, critically imperiled, imperiled, vulnerable, apparently secure, and secure. The system also allows ambiguous or uncertain ranks including inexact numeric ranks, NatureServe adds a qualifier for captive or cultivated only, which has a similar meaning to the IUCN Red List extinct in the wild status. The Red Data Book of the Russian Federation is used within the Russian Federation, in Australia, the Environment Protection and Biodiversity Conservation Act 1999 describes lists of threatened species, ecological communities and threatening processes. The categories resemble those of the 1994 IUCN Red List Categories & Criteria, prior to the EPBC Act, a simpler classification system was used by the Endangered Species Protection Act 1992. Some state and territory governments also have their own systems for conservation status, in Belgium, the Flemish Research Institute for Nature and Forest publishes an online set of more than 150 nature indicators in Dutch. In Canada, the Committee on the Status of Endangered Wildlife in Canada is a group of experts that assesses and designates which wild species are in danger of disappearing from Canada. Under the Species at Risk Act, it is up to the federal government, in China, the State, provinces and some counties have determined their key protected wildlife species. There is the China red data book, in Finland, a large number of species are protected under the Nature Conservation Act, and through the EU Habitats Directive and EU Birds Directive. In Germany, the Federal Agency for Nature Conservation publishes red lists of endangered species, india has the Wild Life Protection Act,1972, Amended 2003 and the Biological Diversity Act,2002. In Japan, the Ministry of Environment publishes a Threatened Wildlife of Japan Red Data Book, in the Netherlands, the Dutch Ministry of Agriculture, Nature and Food Quality publishes a list of threatened species, and conservation is enforced by the Nature Conservation Act 1998. Species are also protected through the Wild Birds and Habitats Directives, in New Zealand, the Department of Conservation publishes the New Zealand Threat Classification System lists
2.
Near Threatened
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The IUCN notes the importance of re-evaluating near-threatened taxa at appropriate intervals. The rationale used for near-threatened taxa usually includes the criteria of vulnerable which are plausible or nearly met, additionally, the 402 conservation-dependent taxa may also be considered near-threatened. Prior to 2001, the IUCN used the version 2.3 Categories and Criteria, with this category system, Near Threatened and Conservation Dependent were both subcategories of the category Lower Risk. IUCN Red List near threatened species, ordered by taxonomic rank, category, IUCN Red List near threatened species, ordered alphabetically
3.
IUCN Red List
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The IUCN Red List of Threatened Species, founded in 1964, is the worlds most comprehensive inventory of the global conservation status of biological species. The International Union for Conservation of Nature is the main authority on the conservation status of species. A series of Regional Red Lists are produced by countries or organizations, the IUCN Red List is set upon precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world, the aim is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to try to reduce species extinction. Major species assessors include BirdLife International, the Institute of Zoology, the World Conservation Monitoring Centre, collectively, assessments by these organizations and groups account for nearly half the species on the Red List. The IUCN aims to have the category of every species re-evaluated every five years if possible, the 1964 IUCN Red List of Threatened Plants used the older pre-criteria Red List assessment system. Plants listed may not, therefore, appear in the current Red List, IUCN advise that is best to check both the online Red List and the 1997 plants Red List publication. The 2006 Red List, released on 4 May 2006 evaluated 40,168 species as a whole, plus an additional 2,160 subspecies, varieties, aquatic stocks, on 12 September 2007, the World Conservation Union released the 2007 IUCN Red List of Threatened Species. Russ Mittermeier, chief of Swiss-based IUCNs Primate Specialist Group, stated that 16,306 species are endangered with extinction,188 more than in 2006, the Red List includes the Sumatran orangutan in the Critically Endangered category and the Bornean orangutan in the Endangered category. The study shows at least 1,141 of the 5,487 mammals on Earth are known to be threatened with extinction, and 836 are listed as Data Deficient. The Red List of 2012 was released 19 July 2012 at Rio+20 Earth Summit, nearly 2,000 species were added, the IUCN assessed a total of 63,837 species which revealed 19,817 are threatened with extinction. With 3,947 described as endangered and 5,766 as endangered. At threat are 41% of amphibian species, 33% of reef-building corals, 30% of conifers, 25% of mammals, the IUCN Red List has listed 132 species of plants and animals from India as Critically Endangered. Extinct – No known individuals remaining, extinct in the wild – Known only to survive in captivity, or as a naturalized population outside its historic range. Critically endangered – Extremely high risk of extinction in the wild, Endangered – High risk of extinction in the wild. Vulnerable – High risk of endangerment in the wild, near threatened – Likely to become endangered in the near future. Does not qualify for a more at-risk category, widespread and abundant taxa are included in this category. Data deficient – Not enough data to make an assessment of its risk of extinction, Not evaluated – Has not yet been evaluated against the criteria
4.
Taxonomy (biology)
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Taxonomy is the science of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups. The exact definition of taxonomy varies from source to source, but the core of the remains, the conception, naming. There is some disagreement as to whether biological nomenclature is considered a part of taxonomy, the broadest meaning of taxonomy is used here. The word taxonomy was introduced in 1813 by Candolle, in his Théorie élémentaire de la botanique, the term alpha taxonomy is primarily used today to refer to the discipline of finding, describing, and naming taxa, particularly species. In earlier literature, the term had a different meaning, referring to morphological taxonomy, ideals can, it may be said, never be completely realized. They have, however, a value of acting as permanent stimulants. Some of us please ourselves by thinking we are now groping in a beta taxonomy, turrill thus explicitly excludes from alpha taxonomy various areas of study that he includes within taxonomy as a whole, such as ecology, physiology, genetics, and cytology. He further excludes phylogenetic reconstruction from alpha taxonomy, thus, Ernst Mayr in 1968 defined beta taxonomy as the classification of ranks higher than species. This activity is what the term denotes, it is also referred to as beta taxonomy. How species should be defined in a group of organisms gives rise to practical and theoretical problems that are referred to as the species problem. The scientific work of deciding how to define species has been called microtaxonomy, by extension, macrotaxonomy is the study of groups at higher taxonomic ranks, from subgenus and above only, than species. While some descriptions of taxonomic history attempt to date taxonomy to ancient civilizations, earlier works were primarily descriptive, and focused on plants that were useful in agriculture or medicine. There are a number of stages in scientific thinking. Early taxonomy was based on criteria, the so-called artificial systems. Later came systems based on a complete consideration of the characteristics of taxa, referred to as natural systems, such as those of de Jussieu, de Candolle and Bentham. The publication of Charles Darwins Origin of Species led to new ways of thinking about classification based on evolutionary relationships and this was the concept of phyletic systems, from 1883 onwards. This approach was typified by those of Eichler and Engler, the advent of molecular genetics and statistical methodology allowed the creation of the modern era of phylogenetic systems based on cladistics, rather than morphology alone. Taxonomy has been called the worlds oldest profession, and naming and classifying our surroundings has likely been taking place as long as mankind has been able to communicate
5.
Animal
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Animals are multicellular, eukaryotic organisms of the kingdom Animalia. The animal kingdom emerged as a clade within Apoikozoa as the group to the choanoflagellates. Animals are motile, meaning they can move spontaneously and independently at some point in their lives and their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later in their lives. All animals are heterotrophs, they must ingest other organisms or their products for sustenance, most known animal phyla appeared in the fossil record as marine species during the Cambrian explosion, about 542 million years ago. Animals can be divided broadly into vertebrates and invertebrates, vertebrates have a backbone or spine, and amount to less than five percent of all described animal species. They include fish, amphibians, reptiles, birds and mammals, the remaining animals are the invertebrates, which lack a backbone. These include molluscs, arthropods, annelids, nematodes, flatworms, cnidarians, ctenophores, the study of animals is called zoology. The word animal comes from the Latin animalis, meaning having breath, the biological definition of the word refers to all members of the kingdom Animalia, encompassing creatures as diverse as sponges, jellyfish, insects, and humans. Aristotle divided the world between animals and plants, and this was followed by Carl Linnaeus, in the first hierarchical classification. In Linnaeuss original scheme, the animals were one of three kingdoms, divided into the classes of Vermes, Insecta, Pisces, Amphibia, Aves, and Mammalia. Since then the last four have all been subsumed into a single phylum, in 1874, Ernst Haeckel divided the animal kingdom into two subkingdoms, Metazoa and Protozoa. The protozoa were later moved to the kingdom Protista, leaving only the metazoa, thus Metazoa is now considered a synonym of Animalia. Animals have several characteristics that set apart from other living things. Animals are eukaryotic and multicellular, which separates them from bacteria and they are heterotrophic, generally digesting food in an internal chamber, which separates them from plants and algae. They are also distinguished from plants, algae, and fungi by lacking cell walls. All animals are motile, if only at life stages. In most animals, embryos pass through a stage, which is a characteristic exclusive to animals. With a few exceptions, most notably the sponges and Placozoa and these include muscles, which are able to contract and control locomotion, and nerve tissues, which send and process signals
6.
Chordate
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Chordates are deuterostomes, as during the embryo development stage the anus forms before the mouth. They are also bilaterally symmetric coelomates, in the case of vertebrate chordates, the notochord is usually replaced by a vertebral column during development, and they may have body plans organized via segmentation. There are also additional extinct taxa, the Vertebrata are sometimes considered as a subgroup of the clade Craniata, consisting of chordates with a skull, the Craniata and Tunicata compose the clade Olfactores. Of the more than 65,000 living species of chordates, the worlds largest and fastest animals, the blue whale and peregrine falcon respectively, are chordates, as are humans. Fossil chordates are known from at least as early as the Cambrian explosion, Hemichordata, which includes the acorn worms, has been presented as a fourth chordate subphylum, but it now is usually treated as a separate phylum. The Hemichordata, along with the Echinodermata, form the Ambulacraria, the Chordata and Ambulacraria form the superphylum Deuterostomia, composed of the deuterostomes. Attempts to work out the relationships of the chordates have produced several hypotheses. All of the earliest chordate fossils have found in the Early Cambrian Chengjiang fauna. Because the fossil record of early chordates is poor, only molecular phylogenetics offers a prospect of dating their emergence. However, the use of molecular phylogenetics for dating evolutionary transitions is controversial and it has also proved difficult to produce a detailed classification within the living chordates. Attempts to produce family trees shows that many of the traditional classes are paraphyletic. While this has been known since the 19th century, an insistence on only monophyletic taxa has resulted in vertebrate classification being in a state of flux. Although the name Chordata is attributed to William Bateson, it was already in prevalent use by 1880, ernst Haeckel described a taxon comprising tunicates, cephalochordates, and vertebrates in 1866. Though he used the German vernacular form, it is allowed under the ICZN code because of its subsequent latinization, among the vertebrate sub-group of chordates the notochord develops into the spine, and in wholly aquatic species this helps the animal to swim by flexing its tail. In fish and other vertebrates, this develops into the spinal cord, the pharynx is the part of the throat immediately behind the mouth. In fish, the slits are modified to form gills, a muscular tail that extends backwards behind the anus. This is a groove in the wall of the pharynx. In filter-feeding species it produces mucus to gather food particles, which helps in transporting food to the esophagus and it also stores iodine, and may be a precursor of the vertebrate thyroid gland
7.
Bird
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Birds live worldwide and range in size from the 5 cm bee hummingbird to the 2.75 m ostrich. They rank as the class of tetrapods with the most living species, at ten thousand. As a subgroup of Reptilia, birds are the closest living relatives of crocodilians, while birds, the fossil record indicates that birds are also the last surviving representatives of dinosauria, having evolved from feathered ancestors within the theropod group of saurischian dinosaurs. True birds first appeared during the Cretaceous period, around 100 million years ago, dNA-based evidence finds that birds diversified dramatically around the time of the Cretaceous–Palaeogene extinction event which killed off all other dinosaur lineages. Birds, especially those in the continents, survived this event. Primitive bird-like dinosaurs that lie outside class Aves proper, in the broader group Avialae, have been found dating back to the mid-Jurassic period. Birds have wings which are more or less developed depending on the species, the digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have evolved for swimming. Many species annually migrate great distances, Birds are social, communicating with visual signals, calls, and bird songs, and participating in such social behaviours as cooperative breeding and hunting, flocking, and mobbing of predators. The vast majority of species are socially monogamous, usually for one breeding season at a time, sometimes for years. Other species have breeding systems that are polygynous or, rarely, Birds produce offspring by laying eggs which are fertilised through sexual reproduction. They are usually laid in a nest and incubated by the parents, most birds have an extended period of parental care after hatching. Some birds, such as hens, lay eggs even when not fertilised, songbirds, parrots, and other species are popular as pets. Guano is harvested for use as a fertiliser, Birds prominently figure throughout human culture. About 120–130 species have become extinct due to human activity since the 17th century, human activity threatens about 1,200 bird species with extinction, though efforts are underway to protect them. Recreational birdwatching is an important part of the ecotourism industry, the first classification of birds was developed by Francis Willughby and John Ray in their 1676 volume Ornithologiae. Carl Linnaeus modified that work in 1758 to devise the taxonomic classification system currently in use, Birds are categorised as the biological class Aves in Linnaean taxonomy. Phylogenetic taxonomy places Aves in the dinosaur clade Theropoda, Aves and a sister group, the clade Crocodilia, contain the only living representatives of the reptile clade Archosauria
8.
Charadriiformes
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Charadriiformes is a diverse order of small to medium-large birds. It includes about 350 species and has members in all parts of the world, most Charadriiformes live near water and eat invertebrates or other small animals, however, some are pelagic, some occupy deserts and a few are found in thick forest. The gulls and their allies, these are larger species which take fish from the sea. Several gulls and skuas will also take food items from beaches, or rob smaller species, the auks are coastal species which nest on sea cliffs and fly underwater to catch fish. The Sibley-Ahlquist taxonomy, which has widely accepted in America. The auks, usually considered distinct because of their morphology, are more likely related to gulls. Following recent research, an arrangement may be as follows, This is a list of the charadriiform families. The buttonquails are of indeterminate or basal position in the Lari-Scolopaci sensu lato group, the arrangement as presented here is a consensus of the recent studies. Cladogram based on Baker, A. J. et al and that the Charadriiformes are an ancient group is also borne out by the fossil record. Much of the Neornithes fossil record around the Cretaceous–Paleogene extinction event is made up of bits, in many, this is probably due to convergent evolution brought about by semi-aquatic habits. Specimen VI9901 is probably a basal charadriiform somewhat reminiscent of a thick-knee, however, more complete remains of undisputed charadriiforms are known only from the mid-Paleogene onwards. Present-day orders emerged around the Eocene-Oligocene boundary, roughly 35-30 mya, basal or unresolved charadriiforms are, Morsoravis - a nomen nudum. (Sajóvölgyi Middle Miocene of Mátraszõlõs, Hungary Totanus teruelensis - scolopacid, the transitional shorebirds are a generally Mesozoic form taxon formerly believed to constitute the common ancestors of charadriiforms, waterfowl and flamingos. Taxa formerly considered graculavids are, Laornithidae - charadriiform, dakotornis Graculavidae gen. et sp. indet. They therefore present a set of examples to support the understanding of the evolution of parental care in avians generally. The ancestral avian most likely had a female parental care system, the shorebird ancestor specifically evolved from a bi-parental care system, yet the species within the clade Scolopacidae evolved from a male parental care system. These transitions might have occurred for several reasons, brooding density is correlated with male parental care. Male care systems in birds are shown to have a low breeding density while female care systems in birds have a high breeding density
9.
Charadriidae
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The bird family Charadriidae includes the plovers, dotterels, and lapwings, about 64 to 66 species in all. They are small to medium-sized birds with compact bodies, short, thick necks and long, usually pointed, wings and their bill are usually straight and short, their toes are short, hind toe could be reduced or absent, depending on species. Most Charadriidae also have short tails, the killdeer is the exception. In most genera, the sexes are similar, very little sexual dimorphism occurs between sexes and they range in size from the collared plover, at 26 grams and 14 cm, to the masked lapwing, at 368 grams and 35 cm. They hunt by sight, rather than by feel as longer-billed waders like snipe do and they also feed on plant material. Vast majority of Charadriidae have a monogamous mating system. Some, such as Northern lapwings, are polygynyous, others, in Eurasian dotterels, females compete for males and males provide all parental care. While breeding, they defend their territories with highly visible aerial displays, charadridae lay two to four eggs into the nest, which is usually a shallow scrape in the open ground, and incubate the clutch for 21–30 days. In species where both parents incubate the eggs, females and males vary in the way they share their incubation duties, both within and between species. In some pairs, parents exchange on the nest in the morning and in the evening so that their incubation rhythm follows 24-hour day, Charadriidae are protective over their eggs and offspring. The parents protect their young by uttering an alarm call, performing distraction display, the chicks are precocial, their parents do not feed them. Most members of the family are known as plovers, lapwings or dotterels and these were rather vague terms which were not applied with any great consistency in the past. The trend in recent years has been to rationalise the common names of the Charadriidae, for example, the large and very common Australian bird traditionally known as the ‘spur-winged plover’, is now the masked lapwing, the former ‘sociable plover’ is now the sociable lapwing. Charadriidae videos on the Internet Bird Collection Incubating Charadriidae videos in Incubating shorebirds Charadriidae sounds on xeno-canto. org
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Charadrius
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Charadrius is a genus of plovers, a group of wading birds. The genus name Charadrius is a Late Latin word for a bird mentioned in the fourth-century Vulgate. The name derives from Ancient Greek kharadrios, a found in river valleys. Some believed that seeing it cured jaundice and they are found throughout the world. Many of the Charadrius species are characterised by breast bands or collars and these can be complete bands, double or triple bands or partial collars. They hunt by sight, rather than by feel as do longer-billed waders like snipe, species of the genus Aegialites are now subsumed within Charadrius
11.
Binomial nomenclature
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Such a name is called a binomial name, a binomen, binominal name or a scientific name, more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs, for example, humans belong to the genus Homo and within this genus to the species Homo sapiens. The formal introduction of system of naming species is credited to Carl Linnaeus. But Gaspard Bauhin, in as early as 1623, had introduced in his book Pinax theatri botanici many names of genera that were adopted by Linnaeus. Although the general principles underlying binomial nomenclature are common to these two codes, there are differences, both in the terminology they use and in their precise rules. Similarly, both parts are italicized when a binomial name occurs in normal text, thus the binomial name of the annual phlox is now written as Phlox drummondii. In scientific works, the authority for a name is usually given, at least when it is first mentioned. In zoology Patella vulgata Linnaeus,1758, the original name given by Linnaeus was Fringilla domestica, the parentheses indicate that the species is now considered to belong in a different genus. The ICZN does not require that the name of the person who changed the genus be given, nor the date on which the change was made, in botany Amaranthus retroflexus L. – L. is the standard abbreviation used in botany for Linnaeus. – Linnaeus first named this bluebell species Scilla italica, Rothmaler transferred it to the genus Hyacinthoides, the ICN does not require that the dates of either publication be specified. Prior to the adoption of the binomial system of naming species. Together they formed a system of polynomial nomenclature and these names had two separate functions. First, to designate or label the species, and second, to be a diagnosis or description, such polynomial names may sometimes look like binomials, but are significantly different. For example, Gerards herbal describes various kinds of spiderwort, The first is called Phalangium ramosum, Branched Spiderwort, is aptly termed Phalangium Ephemerum Virginianum, Soon-Fading Spiderwort of Virginia. The Latin phrases are short descriptions, rather than identifying labels, the Bauhins, in particular Caspar Bauhin, took some important steps towards the binomial system, by pruning the Latin descriptions, in many cases to two words. The adoption by biologists of a system of binomial nomenclature is due to Swedish botanist and physician Carl von Linné. It was in his 1753 Species Plantarum that he first began using a one-word trivial name together with a generic name in a system of binomial nomenclature. This trivial name is what is now known as an epithet or specific name
12.
George Ord
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George Ord was an American naturalist, ornithologist and writer. His father was a maker and Ord joined him in the business. In 1829 he retired from the business so that he could devote time to science. In 1815 Ord became a member of the Academy of Natural Sciences of Philadelphia and he went on to hold important positions in both. Ord received several of the specimens brought back by Lewis and Clark for description, including bear, black-tailed prairie dog. Ord was a friend and avid supporter of Alexander Wilson, accompanying him on several of his journeys, after Wilsons death he finished the eighth and ninth volumes of Wilsons American Ornithology. He issued a life of Wilson in 1828 and published biographies of his fellow naturalists Thomas Say and he also assisted in the enlargement of Samuel Johnsons dictionary and the first edition of Noah Websters dictionary. He was hostile to John James Audubon, whose drawings he disliked and he is buried in Philadelphia not far from Wilson in Gloria Dei Church cemetery. Reprint from Southwark Historical Society George Ord at Find a Grave
13.
Subspecies
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In biological classification, subspecies is either a taxonomic rank subordinate to species, or a taxonomic unit in that rank. A subspecies cannot be recognized independently, a species will either be recognized as having no subspecies at all or at least two, in zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, in bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides whether to recognize a subspecies or not, the differences between subspecies are usually less distinct than the differences between species. In zoology, the International Code of Zoological Nomenclature accepts only one rank below that of species, other groupings, infrasubspecific entities do not have names regulated by the ICZN. Such forms have no official ICZN status, though they may be useful in describing altitudinal or geographical clines, pet breeds, transgenic animals, etc. While the scientific name of a species is a binomen, the name of a subspecies is a trinomen - a binomen followed by a subspecific name. A tigers binomen is Panthera tigris, so for a Sumatran tiger the trinomen is, for example, names published before 1992 in the rank of variety are taken to be names of subspecies. In botany, subspecies is one of many ranks below that of species, such as variety, subvariety, form, the subspecific name is preceded by subsp. or ssp. as Schoenoplectus californicus ssp. tatora. A botanical name consists of at most three parts, an infraspecific name includes the species binomial, and one infraspecific epithet, such as subspecies or variety. For example, Motacilla alba alba is the subspecies of the white wagtail. The subspecies name that repeats the name is referred to in botanical nomenclature as the subspecies autonym. When zoologists disagree over whether a population is a subspecies or a full species. A subspecies is a rank below species – the only recognized rank in the zoological code. Botanists and mycologists have the choice of ranks lower than subspecies, such as variety or form, in biological terms, rather than in relation to nomenclature, a polytypic species has two or more subspecies, races, or more generally speaking, populations that need a separate description. These are separate groups that are distinct from one another and do not generally interbreed. These subspecies, races, or populations, can be named as subspecies by zoologists, a monotypic species has no distinct population or races, or rather one race comprising the whole species. A taxonomist would not name a subspecies within such a species, monotypic species can occur in several ways, All members of the species are very similar and cannot be sensibly divided into biologically significant subcategories
14.
Wader
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Waders are birds commonly found along shorelines and mudflats that wade in order to forage for food in the mud or sand. They are called shorebirds in North America, waders are members of the order Charadriiformes, which includes gulls, auks and their allies. There are about 210 species of wader, most of which are associated with wetland or coastal environments, many species of Arctic and temperate regions are strongly migratory, but tropical birds are often resident, or move only in response to rainfall patterns. Some of the Arctic species, such as the little stint, are amongst the longest distance migrants, the smallest member of this group is the least sandpiper, small adults of which can weigh as little as 15.5 grams and measure just over 13 cm. The largest species is believed to be the Far Eastern curlew, at about 63 cm and 860 grams, in the Sibley-Ahlquist taxonomy, waders and many other groups are subsumed into a greatly enlarged Ciconiiformes order. Formerly, the waders were united in a single suborder Charadrii, however, it indicated that the plains wanderer actually belonged into one of them. Shorebirds is a term used to refer to multiple species of birds that live in wet. Because most these species spend much of their time near bodies of water, some species prefer locations with rocks or mud. Many shorebirds display migratory patterns and often migrate before breeding season and these behaviors explain the long wing lengths observed in species, and can also account for the efficient metabolisms that give the birds energy during long migrations. The majority of species eat small invertebrates picked out of mud or exposed soil, different lengths of bills enable different species to feed in the same habitat, particularly on the coast, without direct competition for food. Many waders have sensitive nerve endings at the end of their bills which enable them to prey items hidden in mud or soft soil. Some larger species, particularly adapted to drier habitats will take larger prey including insects. Shorebirds, like other animals, exhibit phenotypic differences between males and females, also known as sexual dimorphism. In shorebirds, various sexual dimorphisms are seen, including, but not limited to, size, color, in polygynous species, where one male individual mates with multiple female partners over his lifetime, dimorphisms tend to be more diverse. The suborder of Charadrii displays the widest range of sexual dimorphisms seen in the Charadriiformes order, however, cases of sexual monomorphism, where there are no distinguishing physical features besides external genitalia, are also seen in this order. One of the biggest factors that leads to the development of sexual dimorphism in shorebirds is sexual selection, males with ideal characteristics favored by females are more likely to reproduce and pass on their genetic information to their offspring better than the males who lack such characteristics. Mentioned earlier, male shorebirds are typically larger in size compared to their female counterparts, competition between males tends to lead to sexual selection toward larger males and as a result, an increase in dimorphism. Bigger males tend to have access to female mates because their larger size aids them in defeating other competitors
15.
North America
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North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be considered a subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea. North America covers an area of about 24,709,000 square kilometers, about 16. 5% of the land area. North America is the third largest continent by area, following Asia and Africa, and the fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 565 million people in 23 independent states, or about 7. 5% of the worlds population, North America was reached by its first human populations during the last glacial period, via crossing the Bering land bridge. The so-called Paleo-Indian period is taken to have lasted until about 10,000 years ago, the Classic stage spans roughly the 6th to 13th centuries. The Pre-Columbian era ended with the migrations and the arrival of European settlers during the Age of Discovery. Present-day cultural and ethnic patterns reflect different kind of interactions between European colonists, indigenous peoples, African slaves and their descendants, European influences are strongest in the northern parts of the continent while indigenous and African influences are relatively stronger in the south. Because of the history of colonialism, most North Americans speak English, Spanish or French, the Americas are usually accepted as having been named after the Italian explorer Amerigo Vespucci by the German cartographers Martin Waldseemüller and Matthias Ringmann. Vespucci, who explored South America between 1497 and 1502, was the first European to suggest that the Americas were not the East Indies, but a different landmass previously unknown by Europeans. In 1507, Waldseemüller produced a map, in which he placed the word America on the continent of South America. He explained the rationale for the name in the accompanying book Cosmographiae Introductio, for Waldseemüller, no one should object to the naming of the land after its discoverer. He used the Latinized version of Vespuccis name, but in its feminine form America, following the examples of Europa, Asia and Africa. Later, other mapmakers extended the name America to the continent, In 1538. Some argue that the convention is to use the surname for naming discoveries except in the case of royalty, a minutely explored belief that has been advanced is that America was named for a Spanish sailor bearing the ancient Visigothic name of Amairick. Another is that the name is rooted in a Native American language, the term North America maintains various definitions in accordance with location and context. In Canadian English, North America may be used to refer to the United States, alternatively, usage sometimes includes Greenland and Mexico, as well as offshore islands
16.
Beach
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A beach is a landform along a body of water. It usually consists of particles, which are often composed of rock, such as sand, gravel, shingle, pebbles. The particles comprising a beach are occasionally biological in origin, such as shells or coralline algae. Some beaches have man-made infrastructure, such as posts, changing rooms. They may also have hospitality venues nearby, wild beaches, also known as undeveloped or undiscovered beaches, are not developed in this manner. Wild beaches can be valued for their beauty and preserved nature. Beaches typically occur in areas along the coast where wave or current action deposits, although the seashore is most commonly associated with the word beach, beaches are also found by lakes and alongside large rivers. Beach may refer to, small systems where rock material moves onshore, offshore, or alongshore by the forces of waves and currents, the former are described in detail below, the larger geological units are discussed elsewhere under bars. There are several parts to a beach that relate to the processes that form. The part mostly above water, and more or less influenced by the waves at some point in the tide, is termed the beach berm. The berm is the deposit of material comprising the active shoreline, the berm has a crest and a face — the latter being the slope leading down towards the water from the crest. At the very bottom of the face, there may be a trough, at some point the influence of the waves on the material comprising the beach stops, and if the particles are small enough, winds shape the feature. Where wind is the force distributing the grains inland, the deposit behind the beach becomes a dune and these geomorphic features compose what is called the beach profile. The beach profile changes seasonally due to the change in energy experienced during summer and winter months. In temperate areas where summer is characterised by calmer seas and longer periods between breaking wave crests, the profile is higher in summer. The gentle wave action during this season tends to transport sediment up the beach towards the berm where it is deposited, onshore winds carry it further inland forming and enhancing dunes. Conversely, the profile is lower in the storm season due to the increased wave energy. The removal of sediment from the berm and dune thus decreases the beach profile
17.
Atlantic Ocean
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The Atlantic Ocean is the second largest of the worlds oceans with a total area of about 106,460,000 square kilometres. It covers approximately 20 percent of the Earths surface and about 29 percent of its surface area. It separates the Old World from the New World, the Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Eurasia and Africa to the east, and the Americas to the west. The Equatorial Counter Current subdivides it into the North Atlantic Ocean, in contrast, the term Atlantic originally referred specifically to the Atlas Mountains in Morocco and the sea off the Strait of Gibraltar and the North African coast. The Greek word thalassa has been reused by scientists for the huge Panthalassa ocean that surrounded the supercontinent Pangaea hundreds of years ago. The term Aethiopian Ocean, derived from Ancient Ethiopia, was applied to the Southern Atlantic as late as the mid-19th century, many Irish or British people refer to the United States and Canada as across the pond, and vice versa. The Black Atlantic refers to the role of ocean in shaping black peoples history. Irish migration to the US is meant when the term The Green Atlantic is used, the term Red Atlantic has been used in reference to the Marxian concept of an Atlantic working class, as well as to the Atlantic experience of indigenous Americans. Correspondingly, the extent and number of oceans and seas varies, the Atlantic Ocean is bounded on the west by North and South America. It connects to the Arctic Ocean through the Denmark Strait, Greenland Sea, Norwegian Sea, to the east, the boundaries of the ocean proper are Europe, the Strait of Gibraltar and Africa. In the southeast, the Atlantic merges into the Indian Ocean, the 20° East meridian, running south from Cape Agulhas to Antarctica defines its border. In the 1953 definition it extends south to Antarctica, while in later maps it is bounded at the 60° parallel by the Southern Ocean, the Atlantic has irregular coasts indented by numerous bays, gulfs, and seas. Including these marginal seas the coast line of the Atlantic measures 111,866 km compared to 135,663 km for the Pacific. Including its marginal seas, the Atlantic covers an area of 106,460,000 km2 or 23. 5% of the ocean and has a volume of 310,410,900 km3 or 23. 3%. Excluding its marginal seas, the Atlantic covers 81,760,000 km2 and has a volume of 305,811,900 km3, the North Atlantic covers 41,490,000 km2 and the South Atlantic 40,270,000 km2. The average depth is 3,646 m and the maximum depth, the bathymetry of the Atlantic is dominated by a submarine mountain range called the Mid-Atlantic Ridge. It runs from 87°N or 300 km south of the North Pole to the subantarctic Bouvet Island at 42°S, the MAR divides the Atlantic longitudinally into two halves, in each of which a series of basins are delimited by secondary, transverse ridges. The MAR reaches above 2000 m along most of its length, the MAR is a barrier for bottom water, but at these two transform faults deep water currents can pass from one side to the other
18.
Great Lakes
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Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth, containing 21% of the worlds surface fresh water by volume. The total surface is 94,250 square miles, and the volume is 5,439 cubic miles. Due to their sea-like characteristics the five Great Lakes have also long been referred to as inland seas, Lake Superior is the second largest lake in the world by area, and Lake Michigan is the largest lake that is entirely within one country. The southern half of the Great Lakes is bordered by the Great Lakes Megalopolis, the lakes have been a major highway for transportation, migration and trade, and they are home to a large number of aquatic species. Many invasive species have been introduced due to trade, and some threaten the regions biodiversity, though the five lakes reside in separate basins, they form a single, naturally interconnected body of fresh water, within the Great Lakes Basin. The lakes form a chain connecting the interior of North America to the Atlantic Ocean. From the interior to the outlet at the Saint Lawrence River, water flows from Superior to Huron and Michigan, southward to Erie, the lakes drain a large watershed via many rivers, and are studded with approximately 35,000 islands. There are also several smaller lakes, often called inland lakes. The surface area of the five primary lakes combined is roughly equal to the size of the United Kingdom, while the area of the entire basin is about the size of the UK. Lake Michigan is the one of the Great Lakes that is located entirely within the United States. The lakes are divided among the jurisdictions of the Canadian province of Ontario and the U. S. states of Minnesota, Wisconsin, Michigan, Illinois, Indiana, Ohio, Pennsylvania, and New York. Both Ontario and Michigan include in their boundaries portions of four of the lakes, Ontario does not border Lake Michigan, New York and Wisconsins jurisdictions extend into two lakes, and the remaining states into one of the lakes. This designation, however, is not universal and those living on the shore of Lake Superior often refer to all the other lakes as the lower lakes, because they are farther south. This corresponds to thinking of Lakes Erie and Ontario as down south, vessels sailing north on Lake Michigan are considered upbound even though they are sailing toward its effluent current. The Chicago River and Calumet River systems connect the Great Lakes Basin to the Mississippi River System through man-made alterations, the St. Marys River, including the Soo Locks, connects Lake Superior to Lake Huron. The Straits of Mackinac connect Lake Michigan to Lake Huron, the St. Clair River connects Lake Huron to Lake St. Clair. The Detroit River connects Lake St. Clair to Lake Erie, the Niagara River, including Niagara Falls, connects Lake Erie to Lake Ontario. The Welland Canal, bypassing the Falls, connects Lake Erie to Lake Ontario, the Saint Lawrence River connects Lake Ontario to the Gulf of St. Lawrence, which connects to the Atlantic Ocean
19.
United States
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Forty-eight of the fifty states and the federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east, the state of Hawaii is an archipelago in the mid-Pacific Ocean. The U. S. territories are scattered about the Pacific Ocean, the geography, climate and wildlife of the country are extremely diverse. At 3.8 million square miles and with over 324 million people, the United States is the worlds third- or fourth-largest country by area, third-largest by land area. It is one of the worlds most ethnically diverse and multicultural nations, paleo-Indians migrated from Asia to the North American mainland at least 15,000 years ago. European colonization began in the 16th century, the United States emerged from 13 British colonies along the East Coast. Numerous disputes between Great Britain and the following the Seven Years War led to the American Revolution. On July 4,1776, during the course of the American Revolutionary War, the war ended in 1783 with recognition of the independence of the United States by Great Britain, representing the first successful war of independence against a European power. The current constitution was adopted in 1788, after the Articles of Confederation, the first ten amendments, collectively named the Bill of Rights, were ratified in 1791 and designed to guarantee many fundamental civil liberties. During the second half of the 19th century, the American Civil War led to the end of slavery in the country. By the end of century, the United States extended into the Pacific Ocean. The Spanish–American War and World War I confirmed the status as a global military power. The end of the Cold War and the dissolution of the Soviet Union in 1991 left the United States as the sole superpower. The U. S. is a member of the United Nations, World Bank, International Monetary Fund, Organization of American States. The United States is a developed country, with the worlds largest economy by nominal GDP. It ranks highly in several measures of performance, including average wage, human development, per capita GDP. While the U. S. economy is considered post-industrial, characterized by the dominance of services and knowledge economy, the United States is a prominent political and cultural force internationally, and a leader in scientific research and technological innovations. In 1507, the German cartographer Martin Waldseemüller produced a map on which he named the lands of the Western Hemisphere America after the Italian explorer and cartographer Amerigo Vespucci
20.
Sand
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Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. It is defined by size, being finer than gravel and coarser than silt, Sand can also refer to a textural class of soil or soil type, i. e. a soil containing more than 85% sand-sized particles by mass. The second most common type of sand is calcium carbonate, for example aragonite, for example, it is the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years like the Caribbean. Sand is a non renewable resource over human timescales, and sand suitable for making concrete is in high demand, in terms of particle size as used by geologists, sand particles range in diameter from 0.0625 mm to 2 mm. An individual particle in this size is termed a sand grain. Sand grains are between gravel and silt, a 1953 engineering standard published by the American Association of State Highway and Transportation Officials set the minimum sand size at 0.074 mm. A1938 specification of the United States Department of Agriculture was 0.05 mm. Sand feels gritty when rubbed between the fingers. ISO14688 grades sands as fine, medium and coarse with ranges 0.063 mm to 0.2 mm to 0.63 mm to 2.0 mm. In the United States, sand is commonly divided into five sub-categories based on size, very fine sand, fine sand, medium sand, coarse sand, and very coarse sand. These sizes are based on the Krumbein phi scale, where size in Φ = -log2D, on this scale, for sand the value of Φ varies from −1 to +4, with the divisions between sub-categories at whole numbers. The composition of sand is highly variable, depending on the local rock sources. The gypsum sand dunes of the White Sands National Monument in New Mexico are famous for their bright, arkose is a sand or sandstone with considerable feldspar content, derived from weathering and erosion of a granitic rock outcrop. Some sands contain magnetite, chlorite, glauconite or gypsum, Sands rich in magnetite are dark to black in color, as are sands derived from volcanic basalts and obsidian. Chlorite-glauconite bearing sands are typically green in color, as are sands derived from basaltic with a high olivine content, many sands, especially those found extensively in Southern Europe, have iron impurities within the quartz crystals of the sand, giving a deep yellow color. Sand deposits in some areas contain garnets and other resistant minerals, the study of individual grains can reveal much historical information as to the origin and kind of transport of the grain. Quartz sand that is weathered from granite or gneiss quartz crystals will be angular. It is called grus in geology or sharp sand in the trade where it is preferred for concrete. Sand that is transported long distances by water or wind will be rounded, people who collect sand as a hobby are known as arenophiles
21.
Shoal
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Often it refers to those submerged ridges, banks, or bars that rise near enough to the surface of a body of water as to constitute a danger to navigation. Shoals are also known as sandbanks, sandbars, or gravelbars, two or more shoals that are either separated by shared troughs or interconnected by past and or present sedimentary and hydrographic processes are referred to as a shoal complex. The term shoal is also used in a number of ways that can be similar or quite different from how it is used in the geologic, geomorphic. Shoals are characteristically long and narrow ridges and they can develop where a stream, river, or ocean current promotes deposition of sediment and granular material, resulting in localized shallowing of the water. Marine shoals also develop either by the in place drowning of barrier islands as the result of sea level rise or by the erosion. Shoals can appear as a coastal landform in the sea, where they are classified as a type of bank, or as fluvial landforms in rivers, streams. A shoal–sandbar may seasonally separate a smaller body of water from the sea, such as, Marine lagoons Brackish water estuaries Freshwater seasonal stream and river mouths and deltas. They are typically composed of sand, although they could be of any matter that the moving water has access to and is capable of shifting around. Wave shoaling is the process when surface waves move towards shallow water, such as a beach, they slow down, their wave height increases and this behavior is called shoaling, and the waves are said to shoal. The waves may or may not build to the point where they break, depending on how large they were to begin with, in particular, waves shoal as they pass over submerged sandbanks or reefs. This can be treacherous for boats and ships, shoaling can also diffract waves, so the waves change direction. For example, if waves pass over a bank which is shallower at one end than the other. Thus the wave fronts will refract, changing direction like light passing through a prism, refraction also occurs as waves move towards a beach if the waves come in at an angle to the beach, or if the beach slopes more gradually at one end than the other. Sandbars, also known as a trough bars, form where the waves are breaking, sometimes this occurs seaward of a trough. Sand carried by the moving bottom current is deposited where the current reaches the wave break. Other longshore bars may lie further offshore, representing the point of even larger waves. A harbor or river bar is a sedimentary deposit formed at an entrance or river mouth by. Where beaches are suitably mobile, or the river’s suspended and/or bed loads are large enough, deposition can build up a sandbar that completely blocks a river mouth and damming the river
22.
Tide
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Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth. Some shorelines experience a semi-diurnal tide—two nearly equal high and low tides each day, other locations experience a diurnal tide—only one high and low tide each day. A mixed tide—two uneven tides a day, or one high, Tides vary on timescales ranging from hours to years due to a number of factors. To make accurate records, tide gauges at fixed stations measure water level over time, gauges ignore variations caused by waves with periods shorter than minutes. These data are compared to the level usually called mean sea level. Tidal phenomena are not limited to the oceans, but can occur in other systems whenever a gravitational field varies in time. For example, the part of the Earth is affected by tides. Tide changes proceed via the following stages, Sea level rises over several hours, covering the intertidal zone, the water rises to its highest level, reaching high tide. Sea level falls over several hours, revealing the intertidal zone, the water stops falling, reaching low tide. Oscillating currents produced by tides are known as tidal streams, the moment that the tidal current ceases is called slack water or slack tide. The tide then reverses direction and is said to be turning, slack water usually occurs near high water and low water. But there are locations where the moments of slack tide differ significantly from those of high, Tides are commonly semi-diurnal, or diurnal. The two high waters on a day are typically not the same height, these are the higher high water. Similarly, the two low waters each day are the low water and the lower low water. The daily inequality is not consistent and is small when the Moon is over the equator. From the highest level to the lowest, Highest Astronomical Tide – The highest tide which can be predicted to occur, note that meteorological conditions may add extra height to the HAT. Mean High Water Springs – The average of the two high tides on the days of spring tides, mean High Water Neaps – The average of the two high tides on the days of neap tides. Mean Sea Level – This is the sea level
23.
Insect
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Insects are a class of hexapod invertebrates within the arthropod phylum that have a chitinous exoskeleton, a three-part body, three pairs of jointed legs, compound eyes and one pair of antennae. They are the most diverse group of animals on the planet, including more than a million described species, the number of extant species is estimated at between six and ten million, and potentially represent over 90% of the differing animal life forms on Earth. Insects may be found in all environments, although only a small number of species reside in the oceans. The life cycles of insects vary but most hatch from eggs, insect growth is constrained by the inelastic exoskeleton and development involves a series of molts. The immature stages can differ from the adults in structure, habit and habitat, Insects that undergo 3-stage metamorphosis lack a pupal stage and adults develop through a series of nymphal stages. The higher level relationship of the Hexapoda is unclear, fossilized insects of enormous size have been found from the Paleozoic Era, including giant dragonflies with wingspans of 55 to 70 cm. The most diverse insect groups appear to have coevolved with flowering plants, adult insects typically move about by walking, flying or sometimes swimming. As it allows for rapid yet stable movement, many insects adopt a tripedal gait in which they walk with their legs touching the ground in alternating triangles, Insects are the only invertebrates to have evolved flight. Many insects spend at least part of their lives under water, with adaptations that include gills. Some species, such as water striders, are capable of walking on the surface of water, Insects are mostly solitary, but some, such as certain bees, ants and termites, are social and live in large, well-organized colonies. Some insects, such as earwigs, show maternal care, guarding their eggs, Insects can communicate with each other in a variety of ways. Male moths can sense the pheromones of female moths over great distances, other species communicate with sounds, crickets stridulate, or rub their wings together, to attract a mate and repel other males. Lampyridae in the beetle order communicate with light, humans regard certain insects as pests, and attempt to control them using insecticides and a host of other techniques. Some insects damage crops by feeding on sap, leaves or fruits, a few parasitic species are pathogenic. Some insects perform complex ecological roles, blow-flies, for example, help consume carrion, Many other insects are considered ecologically beneficial as predators and a few provide direct economic benefit. Silkworms and bees have been used extensively by humans for the production of silk and honey, in some cultures, people eat the larvae or adults of certain insects. Insect first appears documented in English in 1601 in Hollands translation of Pliny, translations of Aristotles term also form the usual word for insect in Welsh, Serbo-Croatian, Russian, etc. The evolutionary relationship of insects to other animal groups remains unclear, in the Pancrustacea theory, insects, together with Entognatha, Remipedia, and Cephalocarida, make up a natural clade labeled Miracrustacea
24.
Marine worm
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Any worm that lives in a marine environment is considered a marine worm. Marine worms are found in different phyla, including the Platyhelminthes, Nematoda, Annelida, Chaetognatha, Hemichordata. For a list of animals that have been called sea worms. Many of these worms have specialized tentacles used for exchanging oxygen and carbon dioxide, some marine worms are tube worms, of which the giant tube worm lives in waters near underwater volcanoes, and can withstand temperatures up to 90 degrees Celsius or about 194 degrees Fahrenheit. Some worms can live in the trench and these worms were first discovered in the Pacific Ocean off the Galapagos Islands
25.
Crustacean
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Crustaceans form a large, diverse arthropod taxon which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill, woodlice and barnacles. In other words, some crustaceans are more related to insects. The 67,000 described species range in size from Stygotantulus stocki at 0.1 mm, to the Japanese spider crab with a leg span of up to 3.8 m, like other arthropods, crustaceans have an exoskeleton, which they moult to grow. Most crustaceans are free-living aquatic animals, but some are terrestrial, some are parasitic, the group has an extensive fossil record, reaching back to the Cambrian, and includes living fossils such as Triops cancriformis, which has existed apparently unchanged since the Triassic period. More than 10 million tons of crustaceans are produced by fishery or farming for human consumption, krill and copepods are not as widely fished, but may be the animals with the greatest biomass on the planet, and form a vital part of the food chain. The scientific study of crustaceans is known as carcinology, and a scientist who works in carcinology is a carcinologist, the body of a crustacean is composed of segments, which are grouped into three regions, the cephalon or head, the thorax, and the pleon or abdomen. The head and thorax may be fused together to form a cephalothorax, the crustacean body is protected by the hard exoskeleton, which must be moulted for the animal to grow. The shell around each somite can be divided into a dorsal tergum, ventral sternum, various parts of the exoskeleton may be fused together. The abdomen bears pleopods, and ends in a telson, which bears the anus, the number and variety of appendages in different crustaceans may be partly responsible for the groups success. It is unclear whether the condition is a derived state which evolved in crustaceans. Trilobites, for instance, also possessed biramous appendages, the main body cavity is an open circulatory system, where blood is pumped into the haemocoel by a heart located near the dorsum. Malacostraca have haemocyanin as the pigment, while copepods, ostracods, barnacles. The alimentary canal consists of a tube that often has a gizzard-like gastric mill for grinding food and a pair of digestive glands that absorb food. Structures that function as kidneys are located near the antennae, a brain exists in the form of ganglia close to the antennae, and a collection of major ganglia is found below the gut. In many decapods, the first pair of pleopods are specialised in the male for sperm transfer, many terrestrial crustaceans mate seasonally and return to the sea to release the eggs. Others, such as woodlice, lay their eggs on land, in most decapods, the females retain the eggs until they hatch into free-swimming larvae. Marine crustaceans are as ubiquitous in the oceans as insects are on land, some branchiurans are able to withstand rapid changes of salinity and will also switch hosts from marine to non-marine species. Krill are the layer and the most important part of the food chain in Antarctic animal communities
26.
Great Plains
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The region is known for supporting extensive cattle ranching and dry farming. The Canadian portion of the Plains is known as the Prairies, some geographers include some territory of northern Mexico in the Plains, but many stop at the Rio Grande. The term Great Plains is used in the United States to describe a sub-section of the even more vast Interior Plains physiographic division and it also has currency as a region of human geography, referring to the Plains Indians or the Plains States. There is no region referred to as the Great Plains in The Atlas of Canada, in terms of human geography, the term prairie is more commonly used in Canada, and the region is known as the Prairie Provinces or simply the Prairies. The region is about 500 mi east to west and 2,000 mi north to south, much of the region was home to American bison herds until they were hunted to near extinction during the mid/late 19th century. It has an area of approximately 500,000 sq mi, current thinking regarding the geographic boundaries of the Great Plains is shown by this map at the Center for Great Plains Studies, University of Nebraska–Lincoln. The term Great Plains, for the region west of about the 96th or 98th meridian, nevin Fennemans 1916 study, Physiographic Subdivision of the United States, brought the term Great Plains into more widespread usage. Before that the region was almost invariably called the High Plains, today the term High Plains is used for a subregion of the Great Plains. The Great Plains are the westernmost portion of the vast North American Interior Plains, during the Cretaceous Period, the Great Plains were covered by a shallow inland sea called the Western Interior Seaway. However, during the Late Cretaceous to the Paleocene, the seaway had begun to recede, leaving thick marine deposits. During the Cenozoic era, specifically about 25 million years ago during the Miocene and Pliocene epochs, existing forest biomes declined and grasslands became much more widespread. The grasslands provided a new niche for mammals, including many ungulates and glires, traditionally, the spread of grasslands and the development of grazers have been strongly linked. The vast majority of animals became extinct in North America at the end of the Pleistocene. In general, the Great Plains have a variety of weather through the year, with very cold and harsh winters and very hot. Wind speeds are very high, especially in winter. Grasslands are among the least protected biomes, humans have converted much of the prairies for agricultural purposes or to create pastures. The Great Plains have dust storms mostly every year or so, the 100th meridian roughly corresponds with the line that divides the Great Plains into an area that receive 20 in or more of rainfall per year and an area that receives less than 20 in. The region is subjected to extended periods of drought, high winds in the region may then generate devastating dust storms
27.
Sparrow
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Sparrows are a family of small passerine birds, Passeridae. They are also known as sparrows, or Old World sparrows, names also used for a particular genus of the family. They are distinct from both the American sparrows, in the family Emberizidae, and from a few other birds sharing their name, such as the Java sparrow of the family Estrildidae. Many species nest on buildings, and the house and Eurasian tree sparrows in particular cities in large numbers. They are primarily seed-eaters, though they also consume small insects, some species scavenge for food around cities and, like gulls or rock doves, will happily eat virtually anything in small quantities. Generally, sparrows are small, plump, brown-grey birds with tails and stubby. The differences between species can be subtle. Members of this range in size from the chestnut sparrow, at 11.4 centimetres and 13.4 grams, to the parrot-billed sparrow. Sparrows are physically similar to other seed-eating birds, such as finches, but have a vestigial dorsal outer primary feather and this bone, the preglossale, helps stiffen the tongue when holding seeds. Other adaptations towards eating seeds are specialised bills and elongated and specialised alimentary canals, the family Passeridae was introduced by the French polymath Constantine Samuel Rafinesque in 1815. Under the classification used in the Handbook of the Birds of the World main groupings of the sparrows are the true sparrows, the snowfinches, and these groups are similar to each other, and are each fairly homogeneous, especially Passer. Some classifications also include the sparrow-weavers and several other African genera which are similar to Passer. They therefore classify it as its own subfamily within Passeridae, some, starting with P. P. Suskin in the 1920s, placed the sparrows in the weaver family as the subfamily Passerinae, and tied them to Plocepasser. Another family sparrows were classed with was the finches, some authorities previously classified the related estrildid finches of the Old World tropics and Australasia as members of the Passeridae. Like sparrows, the finches are small, gregarious and often colonial seed-eaters with short, thick. They are broadly similar in structure and habits, but tend to be very colourful, the 2008 Christidis and Boles taxonomic scheme lists the estrildid finches as the separate family Estrildidae, leaving just the true sparrows in Passeridae. The hedge sparrow or dunnock is similarly unrelated and it is a sparrow in name only, a relict of the old practice of calling more types of small birds sparrows. A few further bird species are called sparrows, such as the Java sparrow
28.
Rocky shore
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A rocky shore is an intertidal area of seacoasts where solid rock predominates. Rocky shores are biologically rich environments, and are a natural laboratory for studying intertidal ecology. Due to their accessibility, they have been well studied for a long time. There are a number of factors that favour the survival of life on rocky shores. Temperate coastal waters are mixed by waves and convection, maintaining adequate availability of nutrients, also, the sea brings plankton and broken organic matter in with each tide. The high availability of light and nutrient levels means that productivity of seaweeds. Human actions can also benefit rocky shores due to nutrient runoff, despite these favourable factors, there are also a number of challenges to marine organisms associated with the rocky shore ecosystem. Generally, the distribution of species is limited by salinity, wave exposure, temperature, desiccation. The constant threat of desiccation during exposure at low tide can result in dehydration, hence, many species have developed adaptations to prevent this drying out, such as the production of mucous layers and shells. Many species use shells and holdfasts to provide stability against strong wave actions, there are also a variety of other challenges such as temperature fluctuations due to tidal flow, changes in salinity and various ranges of illumination. Other threats include predation from birds and other organisms, as well as the effects of pollution. The Ballantine Scale is a defined scale for measuring the degree of exposure level of wave action on a rocky shore. Devised in 1961 by W. J. Ballantine, then at the department of Queen Mary College, London. The species present in the littoral zone therefore indicate the degree of the shores exposure, the scale runs from an extremely exposed shore, to an extremely sheltered shore. Tidal movements of water creates zonation patterns along rocky shores from high to low-tide, the area above the high-tide mark is the supralittoral zone which is virtually a terrestrial environment. The area around the mark is known as the intertidal fringe. Between the high and low-tide marks is the intertidal or littoral zone, below the low-tide mark is the sublittoral or subtidal zone. Rocky shores are exposed to many forms of pollution, in particular related to oil spills
29.
Bird migration
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Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Migration carries high costs in predation and mortality, including from hunting by humans and it occurs mainly in the northern hemisphere, where birds are funnelled on to specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, threats to migratory birds have grown with habitat destruction especially of stopover and wintering sites, as well as structures such as power lines and wind farms. The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year, shorter migrations are common, including altitudinal migrations on mountains such as the Andes and Himalayas. The timing of migration seems to be controlled primarily by changes in day length, migrating birds navigate using celestial cues from the sun and stars, the earths magnetic field, and probably also mental maps. Records of bird migration were made as much as 3,000 years ago by the Ancient Greek writers Hesiod, Homer, Herodotus and Aristotle. The Bible also notes migrations, as in the Book of Job, the author of Jeremiah wrote, Even the stork in the heavens knows its seasons, and the turtle dove, the swift and the crane keep the time of their arrival. Aristotle noted that cranes traveled from the steppes of Scythia to marshes at the headwaters of the Nile, pliny the Elder, in his Historia Naturalis, repeats Aristotles observations. Aristotle however suggested that swallows and other birds hibernated and this belief persisted as late as 1878, when Elliott Coues listed the titles of no less than 182 papers dealing with the hibernation of swallows. It was not until the end of the century that migration as an explanation for the winter disappearance of birds from northern climes was accepted. Bewick then describes an experiment which succeeded in keeping alive in Britain for several years. He concludes, These experiments have since been confirmed by. Migration is the seasonal movement, often north and south. Bird movements include those made in response to changes in food availability, habitat, sometimes, journeys are not termed true migration because they are irregular or in only one direction. Migration is marked by its annual seasonality, non-migratory birds are said to be resident or sedentary. Approximately 1800 of the worlds 10,000 bird species are long-distance migrants, many bird populations migrate long distances along a flyway. The most common pattern involves flying north in the spring to breed in the temperate or Arctic summer, of course, in the southern hemisphere the directions are reversed, but there is less land area in the far south to support long-distance migration. The primary motivation for migration appears to be food, for example, also, the longer days of the northern summer provide extended time for breeding birds to feed their young
30.
Gulf of Mexico
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The Gulf of Mexico is an ocean basin largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and south by Mexico, and on the southeast by Cuba. The U. S. states of Alabama, Florida, Louisiana, Mississippi and Texas border the Gulf on the north, Atlantic and Pacific coasts, or sometimes the south coast, in juxtaposition to the Great Lakes region being the north coast. One of the seven main areas is the Gulf of Mexico basin. The Gulf of Mexico formed approximately 300 million years ago as a result of plate tectonics, the Gulfs basin is roughly oval and is approximately 810 nautical miles wide and floored by sedimentary rocks and recent sediments. It is connected to part of the Atlantic Ocean through the Florida Straits between the U. S. and Cuba, and with the Caribbean Sea via the Yucatan Channel between Mexico and Cuba, with the narrow connection to the Atlantic, the Gulf experiences very small tidal ranges. The size of the Gulf basin is approximately 1.6 million km2, almost half of the basin is shallow continental shelf waters. The basin contains a volume of roughly 2,500 quadrillion liters, the consensus among geologists who have studied the geology of the Gulf of Mexico, is that prior to the Late Triassic, the Gulf of Mexico did not exist. It was created by the collision of plates that formed Pangea. As interpreted by Roy Van Arsdale and Randel T. Cox, geologists and other Earth scientists agree in general that the present Gulf of Mexico basin originated in Late Triassic time as the result of rifting within Pangea. The rifting was associated with zones of weakness within Pangea, including sutures where the Laurentia, South American, first, there was a Late Triassic-Early Jurassic phase of rifting during which rift valleys formed and filled with continental red beds. Second, as rifting progressed through Early and Middle Jurassic time and it was at this time that tectonics first created a connection to the Pacific Ocean across central Mexico and later eastward to the Atlantic Ocean. This flooded the basin created by rifting and crustal thinning to create the Gulf of Mexico. While the Gulf of Mexico was a basin, the subsiding transitional crust was blanketed by the widespread deposition of Louann Salt. Initially, during the Late Jurassic, continued rifting widened the Gulf of Mexico and progressed to the point that sea-floor spreading, at this point, sufficient circulation with the Atlantic Ocean was established that the deposition of Louann Salt ceased. During the Late Jurassic through Early Cretaceous, the occupied by the Gulf of Mexico experienced a period of cooling. The subsidence was the result of a combination of stretching, cooling. Initially, the combination of stretching and cooling caused about 5–7 km of tectonic subsidence of the central thin transitional
31.
Caribbean
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The Caribbean is a region that consists of the Caribbean Sea, its islands and the surrounding coasts. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, situated largely on the Caribbean Plate, the region comprises more than 700 islands, islets, reefs and cays. These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea, in a wider sense, the mainland countries of Belize, Guyana, Suriname and French Guiana are often included due to their political and cultural ties with the region. Geopolitically, the Caribbean islands are usually regarded as a subregion of North America and are organized into 30 territories including sovereign states, overseas departments, and dependencies. From December 15,1954, to October 10,2010, there was a known as the Netherlands Antilles composed of five states. The West Indies cricket team continues to represent many of those nations, the region takes its name from that of the Caribs, an ethnic group present in the Lesser Antilles and parts of adjacent South America at the time of the Spanish conquest. The two most prevalent pronunciations of Caribbean are KARR-ə-BEE-ən, with the accent on the third syllable. The former pronunciation is the older of the two, although the variant has been established for over 75 years. It has been suggested that speakers of British English prefer KARR-ə-BEE-ən while North American speakers more typically use kə-RIB-ee-ən, usage is split within Caribbean English itself. The word Caribbean has multiple uses and its principal ones are geographical and political. The Caribbean can also be expanded to include territories with strong cultural and historical connections to slavery, European colonisation, the United Nations geoscheme for the Americas accords the Caribbean as a distinct region within the Americas. Physiographically, the Caribbean region is mainly a chain of islands surrounding the Caribbean Sea, to the north, the region is bordered by the Gulf of Mexico, the Straits of Florida and the Northern Atlantic Ocean, which lies to the east and northeast. To the south lies the coastline of the continent of South America, politically, the Caribbean may be centred on socio-economic groupings found in the region. For example, the known as the Caribbean Community contains the Co-operative Republic of Guyana. Bermuda and the Turks and Caicos Islands, which are in the Atlantic Ocean, are members of the Caribbean Community. The Commonwealth of the Bahamas is also in the Atlantic and is a member of the Caribbean Community. According to the ACS, the population of its member states is 227 million people. The geography and climate in the Caribbean region varies, Some islands in the region have relatively flat terrain of non-volcanic origin and these islands include Aruba, Barbados, Bonaire, the Cayman Islands, Saint Croix, the Bahamas, and Antigua
32.
Newfoundland and Labrador
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Newfoundland and Labrador is the most easterly province of Canada. Situated in the countrys Atlantic region, it comprises the island of Newfoundland and mainland Labrador to the northwest, in 2013, the provinces population was estimated at 526,702. About 92% of the population lives on the island of Newfoundland. The province is Canadas most linguistically homogeneous, with 97. 6% of residents reporting English as their mother tongue in the 2006 census, historically, Newfoundland was also home to unique varieties of French and Irish, as well as the extinct Beothuk language. In Labrador, local dialects of Innu-aimun and Inuktitut are also spoken, Newfoundland and Labradors capital and largest city, St. Johns, is Canadas 20th-largest census metropolitan area and is home to almost 40 percent of the provinces population. St. Johns is the seat of government, home to the House of Assembly of Newfoundland and Labrador and to the highest court in the jurisdiction and it became the tenth province to enter the Canadian Confederation on March 31,1949, as Newfoundland. On December 6,2001, an amendment was made to the Constitution of Canada to change the official name to Newfoundland. The name Newfoundland is a translation of the Portuguese Terra Nova, the influence of early Portuguese exploration is also reflected in the name of Labrador, which derives from the surname of the Portuguese navigator João Fernandes Lavrador. Newfoundland and Labrador is the most easterly province in Canada, and is located at the corner of North America. The Strait of Belle Isle separates the province into two divisions, Labrador, which is a large area of mainland Canada, and Newfoundland. The province also includes over 7,000 tiny islands, each side is about 400 km long, and its area is 108,860 km2. Newfoundland and its small islands have a total area of 111,390 km2. Newfoundland extends between latitudes 46°36′N and 51°38′N, Labrador is an irregular shape, the western part of its border with Quebec is the drainage divide of the Labrador Peninsula. Lands drained by rivers that flow into the Atlantic Ocean are part of Labrador, most of Labradors southern boundary with Quebec follows the 52nd parallel of latitude. Labradors extreme northern tip, at 60°22′N, shares a border with Nunavut. Together, Newfoundland and Labrador make up 4. 06% of Canadas area, Labrador is the easternmost part of the Canadian Shield, a vast area of ancient metamorphic rock comprising much of northeastern North America. Colliding tectonic plates have shaped much of the geology of Newfoundland, gros Morne National Park has a reputation as an outstanding example of tectonics at work, and as such has been designated a World Heritage Site. The Long Range Mountains on Newfoundlands west coast are the northeasternmost extension of the Appalachian Mountains, the north-south extent of the province, prevalent westerly winds, cold ocean currents and local factors such as mountains and coastline combine to create the various climates of the province
33.
South Carolina
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South Carolina /ˌsaʊθ kærəˈlaɪnə/ is a state in the southeastern region of the United States. The state is bordered to the north by North Carolina, to the south and west by Georgia across the Savannah River, South Carolina became the eighth state to ratify the U. S. Constitution, doing so on May 23,1788. South Carolina became the first state to vote to secede from the Union on December 20,1860, after the American Civil War, it was readmitted into the United States on June 25,1868. South Carolina is the 40th most extensive and the 23rd most populous U. S. state and its GDP as of 2013 was $183.6 billion, with an annual growth rate of 3. 13%. The capital and largest city is Columbia with a 2013 population of 133,358, South Carolina is named in honor of King Charles I of England, under whose reign the English colony was first formed, with Carolus being Latin for Charles. There is evidence of activity in the area about 12000 years ago. Along the Savannah River were the Apalachee, Yuchi, and the Yamasee, further west were the Cherokee, and along the Catawba River, the Catawba. These tribes were village-dwellers, relying on agriculture as their food source. The Cherokee lived in wattle and daub houses made with wood and clay, about a dozen separate small tribes summered on the coast harvesting oysters and fish, and cultivating corn, peas and beans. Travelling inland as much as 50 miles mostly by canoe, they wintered on the plain, hunting deer and gathering nuts. The names of these survive in place names like Edisto Island, Kiawah Island. The Spanish were the first Europeans in the area, in 1521, founding San Miguel de Gualdape, established with 500 settlers, it was abandoned within a year by 150 survivors. In 1562 French settlers established a settlement at what is now the Charlesfort-Santa Elena archaeological site on Parris Island, three years later the Spanish built a fort on the same site, but withdrew following hostilities with the English navy. In 1629, King Charles I of England established the Province of Carolina an area covering what is now South and North Carolina, Georgia, in the 1670s, English planters from the Barbados established themselves near what is now Charleston. Settlers built rice plantations in the South Carolina Lowcountry, east of the Atlantic Seaboard fall line, settlers came from all over Europe. Plantation labor was done by African slaves who formed the majority of the population by 1720, another cash crop was the Indigo plant, a plant source of blue dye, developed by Eliza Lucas. Meanwhile, in Upstate South Carolina, west of the Fall Line, was settled by farmers and traders. Colonists overthrew the rule, seeing more direct representation
34.
Bird ringing
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Bird ringing or bird banding is the attachment of a small, individually numbered metal or plastic tag to the leg or wing of a wild bird to enable individual identification. This helps in keeping track of the movements of the bird and it is common to take measurements and examine conditions of feather molt, subcutaneous fat, age indications and sex during capture for ringing. Other methods of marking birds may also be used to allow for field based identification that does not require capture, the earliest recorded attempts to mark birds were made by Roman soldiers. One instance occurred during the Punic Wars, In 218 BC a crow was released by a besieged garrison, quintus Fabius Pictor used a thread on the birds leg to send a message back. In another instance, an interested in chariot races during the time of Pliny took crows to Volterra,135 miles away. Falconers in the Middle Ages would fit plates on their falcons with seals of their owners, from around 1560 or so, swans were marked with a swan mark, a nick on the bill. Storks injured by arrows traceable to African tribes were found in Germany in 1822, Ringing of birds for scientific purposes was started in 1899 by Hans Christian Cornelius Mortensen, a Danish schoolteacher, using aluminum rings on European starlings. The first banding scheme was established in Germany by Johannes Thienemann in 1903 at the Rossitten Bird Observatory on the Baltic Coast of East Prussia and this was followed by Hungary in 1908, Great Britain in 1909, Yugoslavia in 1910 and the Scandinavian countries between 1911 and 1914. In North America John James Audubon and Ernest Thompson Seton were pioneers although their method of marking birds was different from modern ringing, Audubon tied silver threads onto the legs of young eastern phoebes in 1803 while Seton marked snow buntings in Manitoba with ink in 1882. Paul Bartsch of the Smithsonian Institution is credited with the first modern banding in the U. S. he banded 23 black-crowned night herons in 1902. Bird ringing is the used in the UK and in some other parts of Europe, while the term bird banding is more often used in the USA. Organised ringing efforts are called ringing or banding schemes, and the organisations that run them are ringing or banding authorities and those who ring or band birds are known as ringers or banders, and they are typically active at ringing or banding stations. Birds may be captured by being taken as young birds at the nest, or as adults, captured in fine mist nets, baited traps, Heligoland traps, drag nets, cannon nets, raptors may be caught by many methods, including bal-chatri traps. When a bird is caught, a ring of size is attached to the birds leg. The bird is often weighed and measured, examined for data relevant to the ringers project, the birds so tagged can then be identified when they are re-trapped, or found dead, later. When a ringed bird is found, and the ring number read and reported back to the ringer or ringing authority, the finder can contact the address on the ring, give the unique number, and be told the known history of the birds movements. Some national ringing/banding authorities also accept reports by phone or on web sites. The organising body, by collating many such reports, can then determine patterns of movements for large populations
35.
Bird nest
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A bird nest is the spot in which a bird lays and incubates its eggs and raises its young. The smallest bird nests are those of hummingbirds, tiny cups which can be a mere 2 cm across. At the other extreme, some nest mounds built by the dusky scrubfowl measure more than 11 m in diameter, not all bird species build nests. Most birds build a new nest each year, though some refurbish their old nests, the large eyries of some eagles are platform nests that have been used and refurbished for several years. In most species, the female does most or all of the nest construction, in some polygynous species, however, the male does most or all of the nest building. The nest may also form a part of the display such as in weaver birds. The ability to choose and maintain good nest sites and build high quality nests may be selected for by females in these species, in some species the young from previous broods may also act as helpers for the adults. Not every bird species builds or uses a nest, some auks, for instance—including common murre, thick-billed murre and razorbill—lay their eggs directly onto the narrow rocky ledges they use as breeding sites. The eggs of species are dramatically pointed at one end. This is critical for the survival of the eggs, as there are no nests to keep them from rolling off the side of the cliff. Presumably because of the vulnerability of their eggs, parent birds of these auk species rarely leave them unattended. Nest location and architecture is influenced by local topography and other abiotic factors. King penguins and emperor penguins also do not build nests, instead, they tuck their eggs and they are thus able to move about while incubating, though in practice only the emperor penguin regularly does so. Without the ability to body heat, the penguins would expend far more energy trying to stay warm. Potoos lay their single egg directly atop a broken stump, or into a depression on a branch—typically where an upward-pointing branch died and fell off. Brood parasites, such as the New World cowbirds, the honeyguides, the simplest nest construction is the scrape, which is merely a shallow depression in soil or vegetation. This nest type, which typically has a rim deep enough to keep the eggs from rolling away, is lined with bits of vegetation, small stones. Ostriches, most tinamous, many ducks, most shorebirds, most terns, some falcons, pheasants, quail, partridges, bustards, brooding adults also tend to be well camouflaged, and may be difficult to flush from the nest
36.
Least tern
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The least tern is a species of tern that breeds in North America and locally in northern South America. It is closely related to, and was often considered conspecific with. Other close relatives include the yellow-billed tern and Peruvian tern, both from South America and it is a small tern, 22–24 cm long, with a wingspan of 50 cm, and weighing 39–52 g. The upper parts are a uniform pale gray, and the underparts white. The bill is yellow with a black tip in summer. The wings are pale gray, but with conspicuous black markings on their outermost primaries. It flies over water with fast, jerky wingbeats and a distinctive hunchback appearance and it is migratory, wintering in Central America, the Caribbean and northern South America. Many spend their whole first year in their wintering area and it has occurred as a vagrant to Europe, with one record in Great Britain. The differences among the three subspecies may not be as much as had been thought, S. a. athalassos –, Breeds on the rivers of the Arkansas River, Mississippi River, Brazos River, Trinity River, and Rio Grande basins, winters south to northern Brazil. S. a. S. a. browni –, California least tern, Breeds on the Pacific coast of North America, from central California south to western Mexico, winters mainly in Central America. Threats include egg and fledgling predators, high tides and recreational use of nesting beaches, the western population, the California least tern, was listed as an endangered species in 1972 with a population of about 600 pairs. The California subspecies breeds on beaches and bays of the Pacific Ocean within a limited range of southern California, in San Francisco Bay. While numbers have increased with its protected status, it is still vulnerable to predators. Recent threats include the gull-billed tern, which can decrease reproductive success in a colony to less than 10%, the least tern arrives at its breeding grounds in late April. The breeding colonies are not dense and may appear along marine or estuarine shores, or on sandbar islands in large rivers. Courtship typically takes place removed from the colony site, usually on an exposed tidal flat or beach. Only after courtship has confirmed mate selection does nesting begin by mid-May and is complete by mid-June. Nests are situated on barren to sparsely vegetated places near water, in the southeastern United States, many breeding sites are on white gravel rooftops
37.
Camouflage
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Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the spotted coat, the battledress of a modern soldier. A third approach, motion dazzle, confuses the observer with a pattern, making the object visible. The majority of camouflage methods aim for crypsis, often through a general resemblance to the background, high contrast disruptive coloration, eliminating shadow, and countershading. Some animals, such as chameleons and octopuses, are capable of changing their skin pattern and colours. Military camouflage was spurred by the range and accuracy of firearms in the 19th century. In particular the replacement of the inaccurate musket with the rifle made personal concealment in battle a survival skill, in the 20th century, military camouflage developed rapidly, especially during the First World War. On land, artists such as André Mare designed camouflage schemes, at sea, merchant ships and troop carriers were painted in dazzle patterns that were highly visible, but designed to confuse enemy submarines as to the targets speed, range, and heading. During and after the Second World War, a variety of schemes were used for aircraft. The use of radar since the century has largely made camouflage for fixed-wing military aircraft obsolete. Non-military use of camouflage includes making cell telephone towers less obtrusive, patterns derived from military camouflage are frequently used in fashion clothing, exploiting their strong designs and sometimes their symbolism. Camouflage themes recur in modern art, and both figuratively and literally in science fiction and works of literature, in ancient Greece, Aristotle commented on the colour-changing abilities, both for camouflage and for signalling, of cephalopods including the octopus, in his Historia animalium, The octopus. Seeks its prey by so changing its colour as to render it like the colour of the adjacent to it, it does so also when alarmed. Camouflage has been a topic of interest and research in zoology for well over a century, the English zoologist Edward Bagnall Poulton studied animal coloration, especially camouflage. In his 1890 book The Colours of Animals, he classified different types such as special protective resemblance and his experiments showed that swallowtailed moth pupae were camouflaged to match the backgrounds on which they were reared as larvae. Among vertebrates numerous species of parrots, iguanas, tree-frogs, beddard did however briefly mention other methods, including the alluring coloration of the flower mantis and the possibility of a different mechanism in the orange tip butterfly. He wrote that the scattered green spots upon the surface of the wings might have been intended for a rough sketch of the small flowerets of the plant. The artist Abbott Handerson Thayer formulated what is sometimes called Thayers Law, Thayer was roundly mocked for these views by critics including Teddy Roosevelt
38.
Copulation
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Sexual intercourse, or coitus or copulation, is principally the insertion and thrusting of the penis, usually when erect, into the vagina for sexual pleasure, reproduction, or both. This is also known as vaginal intercourse or vaginal sex, other forms of penetrative sexual intercourse include anal sex, oral sex, fingering, and penetration by use of a dildo. These activities involve physical intimacy between two or more individuals and are used among humans solely for physical or emotional pleasure. A variety of views concern what constitutes sexual intercourse or other sexual activity and it is usually defined by sexual penetration, while non-penetrative sex acts, such as non-penetrative forms of cunnilingus or mutual masturbation, have been termed outercourse. Non-penetrative sex acts, however, may additionally be considered sexual intercourse, the term sex, often a shorthand for sexual intercourse, can mean any form of sexual activity. Religious beliefs also play a role in decisions about sexual intercourse or other sexual activity, such as decisions about virginity, or legal. Religious views on sexuality vary significantly between different religions and sects of the religion, though there are common themes, such as prohibition of adultery. For most non-human mammals, mating and copulation occur at the point of estrus, however, bonobos, dolphins and chimpanzees are known to engage in sexual intercourse regardless of whether or not the female is in estrus, and to engage in sex acts with same-sex partners. Sexual intercourse may be defined by different words, including coitus, copulation, coition and this is often termed vaginal intercourse or vaginal sex. The term vaginal sex, and less often vaginal intercourse, may refer to any vaginal sexual activity, particularly if penetrative. The World Health Organization states that non-English languages and cultures use different terms for sexual activity, various vulgar or slang words and euphemisms are also used to describe sexual intercourse or other sexual activity, such as the term fuck, shag, and the phrase sleep together. Penetration of the vagina by the penis is additionally known as intromission. Vaginal, anal and oral sex are recognized as sexual intercourse more often than other sexual behaviors, lesbians may define oral sex or fingering as sexual intercourse and subsequently an act of virginity loss, or tribadism as a primary form of sexual activity. Researchers commonly define sexual intercourse as penile–vaginal intercourse while using terms, such as anal sex or oral sex. Scholars Richard M. Lerner and Laurence Steinberg state that researchers also rarely disclose how they define sex or even whether they resolved potential discrepancies in definitions of sex. This focus can also relegate other forms of sexual activity to foreplay or contribute to them not being regarded as real sex. Studies regarding the definition of sexual intercourse sometimes conflict, a 1999 study by the Kinsey Institute examined the definition of sex based on a 1991 random sample of 599 college students from 29 U. S. The specificity of questions concerning sexual activity can additionally affect definitions of sexual intercourse or other sexual behaviors, another study by the Kinsey Institute sampled 484 people, ranging in ages 18–96
39.
Brooding
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Incubation refers to the process by which certain oviparous animals hatch their eggs, it also refers to the development of the embryo within the egg. Multiple and various factors are vital to the incubation of various species of animal, in many species of reptile for example, no fixed temperature is necessary, but the actual temperature determines the sex ratio of the offspring. In birds in contrast, the genders of offspring are genetically determined, especially in poultry, the act of sitting on eggs to incubate them is called brooding. A wide range of incubation habits is displayed among birds, the Namaqua sandgrouse of the deserts of southern Africa, needing to keep its eggs cool during the heat of the day, stands over them drooping its wings to shade them. The humidity is also critical, because if the air is too dry the egg will lose too much water to the atmosphere, which can make hatching difficult or impossible. As incubation proceeds, an egg will normally become lighter, in the species that incubate, the work is divided differently between the sexes. Possibly the most common pattern is that the female all the incubation, as in the coscoroba swan. In some species, such as the crane, the male. In others, such as the cassowaries, only the male incubates, the male mountain plover incubates the females first clutch, but if she lays a second, she incubates it herself. In hoatzins, some birds help their parents incubate later broods, the incubation period, the time from the start of uninterrupted incubation to the emergence of the young, varies from 11 days to 85 days. In these latter, the incubation is interrupted, the longest uninterrupted period is 64 to 67 days in the emperor penguin, in general smaller birds tend to hatch faster, but there are exceptions, and cavity nesting birds tend to have longer incubation periods. It can be a demanding process, with adult albatrosses losing as much as 83 g of body weight a day. Megapode eggs take from 49 to 90 days depending on the mound, even in other birds, ambient temperatures can lead to variation in incubation period. Normally, of course, the egg is incubated outside the body, however, in one recorded case, the egg incubation occurred entirely within a chicken. The chick hatched inside and emerged from its mother without the shell, embryo development remains suspended until the onset of incubation. The freshly laid eggs of fowl, ostrich, and several other species can be stored for about two weeks when maintained under 5 C. Extended periods of suspension have been observed in marine birds. Some start to incubate after the last egg of the clutch, incubation periods for birds Very few mammals lay eggs
40.
Distraction display
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Distraction displays are sometimes classified more generically under nest protection behaviors along with aggressive displays such as mobbing. These displays have been studied most extensively in bird species, but also have been documented in populations of stickleback fish, distraction displays frequently take the form of injury-feigning. Distraction displays were considered to be a sort of partial paralysis. On the basis of observations, David Lack postulated that such displays simply resulted from the birds alarm at having been flushed from the nest and had no decoy purpose. He noted a case in the European nightjar, when a bird led him around the nest several times, other researchers, including Edward Allworthy Armstrong, have taken issue with these arguments. Finally, the observation of less vigorous displays due to repeated nest approaches does not preclude the parent animal simply learning that the human is not a threat to its young. One example of apparent control is attention seemingly paid to routes used by the animal when moving away from the nest. Furthermore, researchers have noted parent animals moving towards the predator during the display, Displacement occurs when an animal, unable to satisfy two conflicting impulses, may initiate an out-of-context behavior to vent. In any case, there are forms of distraction display which may in fact have evolved from stress responses. One of these is the display, in which a bird fluffs its feathers to mimic the fur of a rodent. It is possible that this originates from a feather ruffling reflex to alarm. Nonetheless, there have been reports of warblers, which nest arboreally, dropping to the ground to perform a distraction display when disturbed. Finally, distraction display tends to be adaptive when diurnal predation by visually-stimulated predators takes place, distraction display has been most extensively studied in birds. It has been observed in species, including passerines and non-passerines. Injury-feigning, including broken-wing and impeded flight displays, is one of the common forms of distraction. In broken-wing displays, birds that are at the nest walk away from it with wings quivering so as to appear as a target for a predator. Impeded flight displays additionally may suggest an injured wing, but through an airborne display, false brooding is an approach used by plovers. The bird moves away from the nest site and crouches on the ground so as to appear to be sitting at a nonexistent nest and allows the predator to approach closely before escaping
41.
Exclosure
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One purpose of the exclosure is to determine how the area would develop if grazing were not conducted. Another purpose is to demarcate an area safe for humans by excluding potentially deadly animals, for example, a beach may have a shark net around it to prevent sharks from attacking human swimmers. Another example is at wild animal preserves which provide fenced in areas for humans to safely watch lions, tigers, predator proof fence The Kenya Long-term Exclosure Experiment - An exclosure experiment in Africa with both livestock and wildlife. Burnt Creek Exclosure - photos of a Bureau of Land Management exclosure in the Pahsimeroi River Valley of Idaho
42.
Cat
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The domestic cat is a small, typically furry, carnivorous mammal. They are often called house cats when kept as pets or simply cats when there is no need to distinguish them from other felids. Cats are often valued by humans for companionship and for their ability to hunt vermin, there are more than 70 cat breeds, though different associations proclaim different numbers according to their standards. Cats are similar in anatomy to the felids, with a strong flexible body, quick reflexes, sharp retractable claws. Cat senses fit a crepuscular and predatory ecological niche, cats can hear sounds too faint or too high in frequency for human ears, such as those made by mice and other small animals. They can see in near darkness, like most other mammals, cats have poorer color vision and a better sense of smell than humans. Cats, despite being solitary hunters, are a species and cat communication includes the use of a variety of vocalizations. Cats have a high breeding rate, under controlled breeding, they can be bred and shown as registered pedigree pets, a hobby known as cat fancy. Failure to control the breeding of pet cats by neutering, as well as the abandonment of former household pets, has resulted in numbers of feral cats worldwide. In certain areas outside cats native range, this has contributed, along with destruction and other factors. Cats have been known to extirpate a bird species within specific regions, a genetic study in 2007 concluded that domestic cats are descended from Near Eastern wildcats, having diverged around 8,000 BC in the Middle East. As of a 2007 study, cats are the second most popular pet in the US by number of pets owned, in a 2010 study they were ranked the third most popular pet in the UK, after fish and dogs, with around 8 million being owned. The domestic cat is believed to have evolved from the Near Eastern wildcat, the felids are a rapidly evolving family of mammals that share a common ancestor only 10–15 million years ago and include lions, tigers, cougars and many others. Within this family, domestic cats are part of the genus Felis, members of the genus are found worldwide and include the jungle cat of southeast Asia, European wildcat, African wildcat, the Chinese mountain cat, and the Arabian sand cat, among others. The domestic cat was first classified as Felis catus by Carl Linnaeus in the 10th edition of his Systema Naturae published in 1758, because of modern phylogenetics, domestic cats are usually regarded as another subspecies of the wildcat, F. silvestris. This has resulted in mixed usage of the terms, as the cat can be called by its subspecies name. Wildcats have also referred to as various subspecies of F. catus, but in 2003. The most common name in use for the cat remains F. catus
43.
Raccoon
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The raccoon, sometimes spelled racoon, also known as the common raccoon, North American raccoon, northern raccoon and colloquially as coon, is a medium-sized mammal native to North America. The raccoon is the largest of the family, having a body length of 40 to 70 cm. Its grayish coat mostly consists of dense underfur which insulates it against cold weather, two of the raccoons most distinctive features are its extremely dexterous front paws and its facial mask, which are themes in the mythology of several Native American ethnic groups. Raccoons are noted for their intelligence, with studies showing that they are able to remember the solution to tasks for up to three years, the diet of the omnivorous raccoon, which is usually nocturnal, consists of about 40% invertebrates, 33% plant foods, and 27% vertebrates. As a result of escapes and deliberate introductions in the century, raccoons are now also distributed across mainland Europe, Caucasia. Though previously thought to be solitary, there is now evidence that raccoons engage in social behavior. Home range sizes vary anywhere from 3 hectares for females in cities to 5,000 hectares for males in prairies, after a gestation period of about 65 days, two to five young, known as kits, are born in spring. The kits are subsequently raised by their mother until dispersal in late fall, although captive raccoons have been known to live over 20 years, their life expectancy in the wild is only 1.8 to 3.1 years. In many areas, hunting and vehicular injury are the two most common causes of death, the word raccoon was adopted into English from the native Powhatan term, as used in the Virginia Colony. It was recorded on Captain John Smiths list of Powhatan words as aroughcun and it has also been identified as a Proto-Algonquian root *ahrah-koon-em, meaning one who rubs, scrubs and scratches with its hands. Similarly, Spanish colonists adopted the Spanish word mapache from the Nahuatl mapachitli of the Aztecs, in French and European Portuguese, the washing behavior is combined with these languages term for rat, yielding, respectively, raton laveur and ratão-lavadeiro. The colloquial abbreviation coon is used in words like coonskin for fur clothing and in phrases like old coon as a self-designation of trappers. In the 1830s, the U. S. Whig Party used the raccoon as an emblem, causing them to be known as coons by their political opponents. Soon after that it became an ethnic slur, especially in use between 1880 and 1920, and the term is considered offensive. In 1780, Gottlieb Conrad Christian Storr placed the raccoon in its own genus Procyon and it is also possible that Storr had its nocturnal lifestyle in mind and chose the star Procyon as eponym for the species. Based on fossil evidence from France and Germany, the first known members of the family Procyonidae lived in Europe in the late Oligocene about 25 million years ago. Similar tooth and skull structures suggest procyonids and weasels share a common ancestor, after the then-existing species crossed the Bering Strait at least six million years later in the early Miocene, the center of its distribution was probably in Central America. Coatis and raccoons have been considered to share common descent from a species in the genus Paranasua present between 5.2 and 6.0 million years ago
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Fox
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Foxes are small-to-medium-sized, omnivorous mammals belonging to several genera of the family Canidae. Foxes are slightly smaller than a domestic dog, with a flattened skull, upright triangular ears, a pointed, slightly upturned snout. Twelve species belong to the group of Vulpes genus of true foxes. Foxes live on every continent except Antarctica, by far the most common and widespread species of fox is the red fox with about 47 recognized subspecies. The global distribution of foxes, together with their reputation for cunning, has contributed to their prominence in popular culture and folklore in many societies around the world. The hunting of foxes with packs of hounds, long an established pursuit in Europe, the word fox comes from Old English, which derived from Proto-Germanic *fuhsaz. This in turn derives from Proto-Indo-European *puḱ-, meaning ’thick-haired, tail’. Male foxes are known as dogs, tods or reynards, females as vixens, a group of foxes is referred to as a skulk, leash, or earth. Foxes are generally smaller than members of the family Canidae such as wolves, jackals. For example, in the largest species, the red fox, males weigh on average between 4.1 and 8.7 kg, while the smallest species, the fennec fox, weighs just 0.7 to 1.6 kg. Fox-like features typically include a face, pointed ears, an elongated rostrum. Foxes are digitigrade, and thus, walk on their toes, unlike their dog relatives, foxes have partially retractable claws. Fox vibrissae, or whiskers, are black, the whiskers on the muzzle, mystaciae vibrissae, average 100-110mm long, while the whiskers everywhere else on the head average to be shorter in length. Whiskers are also on the forelimbs and average 40mm long, pointing downward and backward, other physical characteristics vary according to habitat and adaptive significance. Fox species differ in fur color, length, and density, coat colors range from pearly white to black and white to black flecked with white or grey on the underside. Fennec foxes, for example, have ears and short fur to aid in keeping the body cool. Arctic foxes, on the hand, have tiny ears and short limbs as well as thick, insulating fur. Red foxes, by contrast, have a typical auburn pelt, a foxs coat color and texture may vary due to the change in seasons, fox pelts are richer and denser in the colder months and lighter in the warmer months
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Endangered
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An endangered species is a species which has been categorized as likely to become extinct. In 2012, the IUCN Red List featured 3079 animal and 2655 plant species as endangered worldwide, the figures for 1998 were, respectively,1102 and 1197. Many nations have laws that protect conservation-reliant species, for example, population numbers, trends and species conservation status can be found in the lists of organisms by population. The conservation status of a species indicates the likelihood that it will become extinct, the IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system. Over 40% of the species are estimated to be at risk of extinction. Internationally,199 countries have signed an accord to create Biodiversity Action Plans that will protect endangered, in the United States, such plans are usually called Species Recovery Plans. Those species of Near Threatened and Least Concern status have been assessed and found to have relatively robust and healthy populations, though these may be in decline. The IUCN categories, with examples of animals classified by them, include, Extinct Extinct in the wild Captive individuals survive, critically endangered Faces an extremely high risk of extinction in the immediate future. Endangered Faces a high risk of extinction in the near future, vulnerable Faces a high risk of endangerment in the medium term. Near-threatened May be considered threatened in the near future, Least concern No immediate threat to species survival. A population size reduction of ≥ 50%, projected or suspected to be met within the next 10 years or three generations, whichever is the longer, based on any of to under A1. E) Quantitative analysis showing the probability of extinction in the wild is at least 20% within 20 years or five generations, there is data from the United States that shows a correlation between human populations and threatened and endangered species. Under the Endangered Species Act in the United States, species may be listed as endangered or threatened, the Salt Creek tiger beetle is an example of an endangered subspecies protected under the ESA. Some endangered species laws are controversial, also lobbying from hunters and various industries like the petroleum industry, construction industry, and logging, has been an obstacle in establishing endangered species laws. The Bush administration lifted a policy that required federal officials to consult an expert before taking actions that could damage endangered species. Under the Obama administration, this policy has been reinstated, being listed as an endangered species can have negative effect since it could make a species more desirable for collectors and poachers. This effect is potentially reducible, such as in China where commercially farmed turtles may be reducing some of the pressure to poach endangered species. Another problem with the species is its effect of inciting the use of the shoot, shovel
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Threatened
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Threatened species are any species which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation and this quantitative metric is one method of evaluating the degree of endangerment. Species which have not been evaluated, or do not have sufficient data also are not considered threatened by the IUCN, Threatened species are also referred to as a red-listed species, as they are listed in the IUCN Red List of Threatened Species. Subspecies, populations and stocks may also be classified as threatened and it is the less protected of the two protected categories. The Bay checkerspot butterfly is an example of a threatened subspecies protected under the ESA, for example, the trumpeter swan is threatened in the state of Minnesota, while large populations still remain in Canada and Alaska. The EPBC Act also recognises and protects threatened ecosystems such as plant communities, some species, such as Lewins rail, are not listed as threatened species under the EPBC Act, but they may be recognised as threatened by individual states or territories. Biodiversity Action Plan IUCN Red List Illegal logging Rare species Red and blue-listed Slash-and-burn Threatened fauna of Australia Sharrock, S. and Jones, conserving Europes threatened plants Botanic Gardens Conservation International
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Ontario
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Ontario, one of the 13 provinces and territories of Canada, is located in east-central Canada. It is Canadas most populous province by a margin, accounting for nearly 40 percent of all Canadians. Ontario is fourth-largest in total area when the territories of the Northwest Territories and it is home to the nations capital city, Ottawa, and the nations most populous city, Toronto. There is only about 1 km of land made up of portages including Height of Land Portage on the Minnesota border. Ontario is sometimes divided into two regions, Northern Ontario and Southern Ontario. The great majority of Ontarios population and arable land is located in the south, in contrast, the larger, northern part of Ontario is sparsely populated with cold winters and is heavily forested. The province is named after Lake Ontario, a thought to be derived from Ontarí, io, a Huron word meaning great lake, or possibly skanadario. Ontario has about 250,000 freshwater lakes, the province consists of three main geographical regions, The thinly populated Canadian Shield in the northwestern and central portions, which comprises over half the land area of Ontario. Although this area mostly does not support agriculture, it is rich in minerals and in part covered by the Central and Midwestern Canadian Shield forests, studded with lakes, Northern Ontario is subdivided into two sub-regions, Northwestern Ontario and Northeastern Ontario. The virtually unpopulated Hudson Bay Lowlands in the north and northeast, mainly swampy. Southern Ontario which is further sub-divided into four regions, Central Ontario, Eastern Ontario, Golden Horseshoe, the highest point is Ishpatina Ridge at 693 metres above sea level located in Temagami, Northeastern Ontario. In the south, elevations of over 500 m are surpassed near Collingwood, above the Blue Mountains in the Dundalk Highlands, the Carolinian forest zone covers most of the southwestern region of the province. A well-known geographic feature is Niagara Falls, part of the Niagara Escarpment, the Saint Lawrence Seaway allows navigation to and from the Atlantic Ocean as far inland as Thunder Bay in Northwestern Ontario. Northern Ontario occupies roughly 87 percent of the area of the province. Point Pelee is a peninsula of Lake Erie in southwestern Ontario that is the southernmost extent of Canadas mainland, Pelee Island and Middle Island in Lake Erie extend slightly farther. All are south of 42°N – slightly farther south than the border of California. The climate of Ontario varies by season and location, the effects of these major air masses on temperature and precipitation depend mainly on latitude, proximity to major bodies of water and to a small extent, terrain relief. In general, most of Ontarios climate is classified as humid continental, Ontario has three main climatic regions
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