A bison is a large, shaggy, hoofed animal. Bison are mostly native to North America, though there is one species found in Western Europe and Central Asia.
The most common type of bison is also called a buffalo, and it's the largest land animal in North America. Bison tend to travel in herds and periodically wallow in dirt to keep themselves cool and free of parasites, and while they're generally slow-moving, they can run as fast as 35 miles per hour when they want to. The word bison is Latin for "wild ox," ultimately from a Slavic or Baltic root meaning "the stinking animal."