Pronghorn (2 images)

Pronghorn are the second fastest land mammal in the world. (Cheetahs are the fastest.)

The closest living relatives of the pronghorn are the giraffe and okapi, which are both found in Africa. While pronghorns are often called "antelope" due to their similar appearance and habitat, they are not closely related to the true antelopes (which are members of the Bovidae family, including cattle, goats, and sheep).

Threats to pronghorn include habitat loss, human-wildlife conflicts, and overexploitation due to historic hunting, which greatly reduced the population size. Two subspecies of pronghorn are on the endangered species list: Peninsular pronghorn and Sonoran pronghorn.