Bighorn Ewe, Yellowstone National Park, WyomingA bighorn ewe munches on some grass in Yellowstone National Park in Wyoming. Like the rams, female bighorn also have horns, but nothing like the size and shape of their male counterparts. Nikon D810 with Nikkor 200-400mm lens (at 200mm) ISO 2000, f/4 at 1/400th of a second.