They kind of look like deer, they look more like antelope. But these creatures are most closely related to giraffes - they're pronghorn. My husband took this picture while driving to work. I believe this is a domestic herd. Pronghorn run fast, almost as fast as cheetahs - and they can run for hours. The males and females grow "antlers" - which are not really antlers, and they shed them and grow new ones every year. When driving to Sun Valley, I've seen them in a cloud of dust running across desert scrub.