Antilocapra Americana (literally the “American goat-antelope”) is found nowhere else in the world. Having roamed the plains and deserts of North America for at least a million years, the pronghorn antelope are the fastest North American mammal, whose powerful legs can carry them to speeds of 60 miles per hour across even the roughest terrain.This curious species has exceptionally keen sight.Their large eyes offer wide peripheral vision and the ability to detect motion as far as four miles away.