Reproduction: Breeding occurs from late June to early September. One calf is born per season. The female will give birth to her calf in a secluded area away from the herd. Calves are nursed from seven to eight months.

Physical Description: Bison are very large animals. Males range in length from 3.6m to 3.8m; females range in length from 2.13m to 3.18m. Two distinctive features of the bison are the shoulder hump, and large head. They have brown fur; color can vary slightly at the front and rear of the animal. They have black horns which curve upward and inward, ending in a sharp tip. They have black, circular hooves.

Behavior: Dominant bulls attempt to restrict access to a small group of females for mating. Individual bulls "tend" females until allowed to mate, following them around and chasing away rival males.

Conservation Status: endangered

Fun Facts:

	Bison have been known to live up to 40 years in captivity.
	Bison are good swimmers as well as runners, capable of reaching speeds of 62 km/hr.
	Bison calves can walk and run only a few hours after birth.