Antilocapra americana , the only species within the family Antilocapridae, is unique in its form. The long, woolly undercoat is covered by coarse, brittle hairs. This animal is reddish-brown or tan above and white below. The neck bears a short black mane and two white stripes across its anterior portion. The rump is white.
Males have a black mask and black patches on the sides of the neck.
Their horns extend past the tips of their ears. The horns of males average 250mm, those of females average 120mm. As the pronghorn is fairly widely distributed over several habitat types, its diet depends on local resources. When browse is not available these animals eat winter wheat. Grassland does not provide enough nutrition for northern pronghorn in the winter.