Pronghorns are an open plains mammal, predominantly found in the Great Plains regions of the western United States and southern Canada. Three subspecies are found in the scrub and desert regions of Arizona and Mexico. They prefer low vegetation, no higher than about thirty inches, as they are watchful for predators. | Pronghorns are an open plains mammal, predominantly found in the Great Plains regions of the western United States and southern Canada. Three subspecies are found in the scrub and desert regions of Arizona and Mexico. They prefer low vegetation, no higher than about thirty inches, as they are watchful for predators. |