Bison, also known as buffalo, are very large animals with a shaggy dark brown mane. They have humped shoulders and short legs that are covered with hair. They have a long tail with a furry end. Their coat is extremely thick in order to keep them warm in cooler temperatures and in the summer months they shed to keep cool. Bison feed mainly on grass, plants and sometimes berries. Finding food in the winter isn't a problem for the bison. They swing their large heads from side to side and push the snow away in order to find grass.