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.
Southern pronghorn eat more forbs and less browse than northern proghorn.
Antilocapra does not drink free water unless the forbs and other vegatation it consumes are low in water. Reproduction Pronghorn are polygamous. In the southern part of the range, breeding begins earlier in the year, in late July. Females ovulate 4 to 7 ova at the time of mating. The number of embryos is reduced when the blastocysts elongate, become threadlike, and begin to tangle and knot.