Pronghorn Pair, Wind Cave National Park, South DakotaA male and female pronghorn trot across a grassy field in Wind Cave National Park in the Black Hills of South Dakota. The male has the nice set of horns. Pronghorn are unique in that they shed their horns each year (usually horns are not shed, whereas antlers are). Moose, elk, deer all have antlers whereas pronghorn, bighorn, mountain goats have horns.
Nikon D800 with Nikkor 200-400mm lens (at 340mm) ISO 400, f/4 at 1/1250th of a second