Bull Elk walking in deep snow in Yellowstone National Park Wyoming.
American Bison posing in early morning light in Yellowstone National Park Wyoming.
Caribou with antlers covered in velvet posing in Denali National Park Alaska.
Bull elk bugling in Hayden Valley in Yellowstone National Park Wyoming.
Dall sheep ram posing on a boulder against blue sky on Primrose Ridge in Denali National Park Alaska.
Two bighorn sheep rams interacting.
Bull moose posing Anchorage Alaska.
Wildebeest silhouette at sunset in the Serengeti National Park Tanzania.
Girraffe drinking water at the Chudob Water Hole in Etosha National Park Namibia.
