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Description
Bison are large, even-toed ungulates in the genus Bison within the subfamily Bovinae.
Two extant and four extinct species of Bison are recognized. Of the four extinct species, three were North American. The fourth, ranged across steepe environments from Western Europe, through Central Asia, and onto North America.

Of the two surviving species, the American Bison is found only in North America, is the more numerous. Although sometimes referred to historically as a "buffalo", it is only distantly related to the true Buffalo. The North American species is composed of two subspecies, the plains Bison, and the wood Bison. The European Bison, or wisent, is found in Europe and the Caucasus, reintroduced after being extinct in the wild.

Description
Bison are large, even-toed ungulates in the genus Bison within the subfamily Bovinae.
Two extant and four extinct species of Bison are recognized. Of the four extinct species, three were North American. The fourth, ranged across steepe environments from Western Europe, through Central Asia, and onto North America.

Of the two surviving species, the American Bison is found only in North America, is the more numerous. Although sometimes referred to historically as a "buffalo", it is only distantly related to the true Buffalo. The North American species is composed of two subspecies, the plains Bison, and the wood Bison. The European Bison, or wisent, is found in Europe and the Caucasus, reintroduced after being extinct in the wild.