Buffalo
Buffalo are HUGE! Some stand six feet at the shoulder and weigh as much as a ton. Once we saw a cow walk up to a fence as tall as she was. She just stood there, nose against the fence--obviously contemplating the greener grass on the other side. Suddenly, she just hopped right over the fence; clearing it cleanly! Although buffalo look big and bulky, they are very quick and agile. A bull can run up to 30 m.p.h. and turn faster than a horse!

Theodore Roosevelt National Park Info Here!