The pronghorn is a species of artiodactyl mammal indigenous to interior western and central North America. Though not an antelope, it is known colloquially in North America as the American antelope, prong buck, pronghorn antelope and prairie antelope, because it closely resembles the antelopes of the Old World and fills a similar ecological niche due to parallel evolution. It is the only surviving member of the family Antilocapridae.

George Ord, Jr. was an American zoologist who specialized in North American ornithology and mammalogy. Based in part on specimens collected by Lewis and Clark in the North American interior, Ord's article "Zoology of North America" (1815), which was published in the second American edition of William Guthrie's Geographical, Historical, and Commercial Grammar, has been recognized as the "first systematic zoology of America by an American".