The pronghorn (Antilocapra americana), also pronghorn antelope or prong buck, is a species of ungulate mammal native to interior western North America. It is the only surviving member of the family Antilocapridae. The pronghorn's closest living relatives are in the giraffe family. Morphology Adult males are 1.3–1.5 m (4 1/4-5 ft) long from nose to tail and stand 81–104 cm (2 5/8-3 3/8 ft) high at the shoulder, and weigh 40–60 kg (88-132 lb). The females are as long, but ave… (More on Pronghorn)