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Humans have introduced more different species to new environments than any single document can record. This list is generally for established species with truly wild populations— not kept domestically, that have been seen numerous times, and have breeding populations.
Examples of introduced animals that have become invasive include the gypsy moth in eastern North America, the zebra mussel and alewife in the Great Lakes, the Canada goose and gray squirrel in Europe, the beaver in Tierra del Fuego, the muskrat in Europe and Asia, the cane toad and red fox in Australia, nutria in North America, Eurasia, and ...
This list of introduced mammal species includes all the species of mammal introduced to an area without regard to that territory being or not being their native area of occupation or the success of that re-introduction or introduction to the area. This practice has been harmful in many areas, although some introductions are made with the aim of ...
Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million in total. Animals range in size from 8.5 millionths of a metre to 33.6 metres (110 ft) long and have complex interactions with each other and their environments, forming intricate food webs.
This category is for list articles about introduced species This category is for articles about introduced species . Please do not add this category to general articles about single organisms, unless it is an article specifically about that species' introduction outside of its native range.
Of the 1,189 migratory creatures studied, more than one in five are threatened.
A recent study of gelatinous marine creatures revealed a curious ability in which two animals fuse and function as a single organism. The comb jelly, one of the oldest animals on Earth, can fuse ...
1. Narwhals. Narwhals are known as the "unicorns of the sea" due to their long, spiral-like tusks, which are actually elongated teeth. These mysterious marine mammals inhabit Arctic waters and use ...