Bison, (genus Bison), also called buffalo or wisent, either of two species of oxlike grazing mammals that constitute the genus Bison of the family Bovidae. The American bison (B. bison), commonly known as the buffalo or the plains buffalo, is native to North America, and the European bison (B. bonasus), or wisent, is native to Europe. Both species were drastically reduced in numbers by hunting and now occupy small protected areas that are tiny fractions of their former ranges
The American bison differs from domestic cattle or oxen in several respects. It is larger and has a broad heavy head that is carried low and cannot be raised to shoulder level. The bison also has a pronounced hump at the shoulders, heavy forequarters, and 14 ribs instead of the 13 found in cattle. The coarse, shaggy fur is dark brown in colour. It grows especially long on the head, neck, and shoulders and usually forms a beard on the chin. On rare occasions a white bison is born; these unusual specimens were especially honoured—and even worshipped—by American Indians.
