Invasive species
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An invasive species is an introduced species that harms its new environment. Invasive species adversely affect habitats and bioregions, causing ecological, environmental, and/or economic damage. Since
North American beaver (Castor canadensis) dam in Tierra del Fuego
Kudzu growing over and smothering trees in Atlanta, Georgia
Canada goldenrod (Solidago canadensis) as a roadside weed in Poland
Vinca in a garden
Extinction
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Extinction is the termination of a species via the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recov
The thylacine (Thylacinus cynocephalus) is an example of a recently extinct species.
Palaeotherium is an example of an extinct genus that is only recorded from fossil records before the existence of hominids.
External mold of the extinct Lepidodendron from the Upper Carboniferous of Ohio
The dodo of Mauritius, shown here in a 1626 illustration by Roelant Savery, is an often-cited example of modern extinction.