Antilocapra americana

f6.7 @ 1/1000s, ISO:2000, Nikon D3S w 500mm and 1.7X tele-extender

"Pronghorn," Wikipedia, the free encyclopedia.The pronghorn, is a species of artiodactyl mammal indigenous 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, cabri (native American) or simply antelope because 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.About five existed when humans entered North America but all except A. americana are now extinct.
Ennis, Montana