This photo was made during the "golden hour" shortly before sunset.
The pronghorn is the fastest land mammal in the Western Hemisphere and the only surviving member of the family Antilocapridae. During the Pleistocene period, about 12 antilocaprid species existed in North America. Three other genera existed when humans entered North America but are now extinct.
As a member of the superfamily Giraffoidea, the pronghorn's closest living relatives are the giraffes and okapi. The Giraffoidea are in turn members of the infraorder Pecora, making pronghorns more distant relatives of the Cervidae (deer) and Bovidae (cattle, goats, sheep, antelopes, and gazelles), among others.
Custer State Park is a state park and wildlife reserve in the Black Hills of southwestern South Dakota, USA. The park is South Dakota's largest and first state park, named after Lt. Colonel George Armstrong Custer.
