The Pronghorn is a species of mammal endemic to interior western and central North America. Though not an antelope, it is often known colloquially in North America as the prong buck, pronghorn antelope, or simply antelope, as it closely resembles the true antelopes of the Old World and fills a similar ecological niche due to convergent evolution. It is the only surviving member of the family Antilocapridae. During the Pleistocene period, 12 antilocaprid species existed in North America. Five existed when humans entered North America 13,000 years ago; and all but A. americana are now extinct. Adult males are 1.3–1.5m (4'3" – 4'10") long from nose to tail, stand .81 –1.04m (32"–41") high at the shoulder, and weigh 36–70 Kg (79–150 lb). The females are the same heights as males but weigh 41–50 Kg (90–110 lb). The feet have just two hooves, with no dewclaws. The body temperature is 38 °C (100 °F). Reference: Wikipedia.