More of the bison on the plains. They are bison, NOT buffalo; I learned this from the brochure.
from wiki: The American bison and the European wisent are the largest terrestrial animals in North America and Europe. Bison are good swimmers and can cross rivers over half a mile (1 km) wide. Bison are nomadic grazers and travel in herds. The bulls leave the herds of females at two or three years of age, and join a male herd which is generally smaller than the female herds. Mature bulls rarely travel alone. Towards the end of the summer, for the reproductive season, the sexes necessarily commingle.