Dall Sheep, Anchorage, AlaskaA female Dall sheep walks along a granite cliff beside the Seward Highway south of Anchorage, Alaska. Dall sheep, also called thinhorn sheep, are characterized by their white fur. They range from western Canada on up through Alaska. Nikon D500 with Nikkor 200-400mm lens (at 350mm) ISO 800, f/5.6 at 1/250th of a second.