The American bison is the largest land animal in North America. Males can stand six feet from hoof to shoulder and weigh between 1000-2000 pounds. Females are around five feet tall and weigh between 800-1000 pounds. The bison has long shaggy brown fur, a mane and beard under its chin and a long tail with a tuft of hair at the end. It has a big head with short black horns and a hump on its shoulders.
The American bison spends the warm hours of the day resting, chewing its cud or wallowing in dirt. It is most active in the early morning and late afternoon.
Bison live in a variety of groups. Females and young males may live in groups of up to 20 bison. Males also can live in groups of up to 20 males, or they can live in smaller groups or individually. Mature males and females usually live apart except during breeding season. Each bison group has a dominant male or female.