Introduced species
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An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distri
Cattle Bos primigenius taurus introduced but not naturalized worldwide
Sweet clover (Melilotus sp.), introduced and naturalized in the Americas from Europe as a forage and cover crop
Wheat Triticum introduced worldwide from its place of origin (Mesopotamia)
Male silver pheasant
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
Introduced species
…species is highly variable. Some have a substantial negative effect on a local ecosystem (in which case they are also classified more specifically as an invasive species), while other introduced species may have little or no negative impact (no invasiveness), integrate well into the ecosystem they have been introduced…
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