bonasus, or wisent, is found in Europe and the Caucasus, reintroduced after being extinct in the wild. athabascae, which was not found in the region. References to 'woods bison' or 'wood bison' from the eastern United States confusingly refer to this subspecies, not B. pennsylvanicus) is no longer considered a valid taxon, being a junior synonym of B. A third subspecies, the eastern bison (B. athabascae, which is the namesake of Wood Buffalo National Park in Canada. The North American species is composed of two subspecies, the Plains bison, B. Although commonly known as a buffalo in the United States and Canada, it is only distantly related to the true buffalo. bison, found only in North America, is the more numerous. Of the two surviving species, the American bison, B. occidentalis, was succeeded at 3,000 BC by B. schoetensacki (woodland bison), and North America with B.

From 2 million years ago to 6,000 BC, steppe bison ranged across the mammoth steppe, inhabiting Europe and northern Asia with B.

priscus (steppe bison), which was the ancestor of all other Bison species. Bison palaeosinensis evolved in the Early Pleistocene in South Asia, and was the evolutionary ancestor of B. Of the six extinct species, five became extinct in the Quaternary extinction event. Two extant and six extinct species are recognised. schoetensacki Bison are large, even-toed ungulates in the genus Bison within the subfamily Bovinae. | image2_caption = European bison (Bison bonasus) | image2 = Bison bonasus (Linnaeus 1758).jpg | image_caption = American bison (Bison bison) | fossil_range =small>Early Pleistocene - Present

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