Bighorn Sheep ram paused in the light snowfall - Lamar Valley, Yellowstone National Park
A pregnant pronghorn - Yellowstone National Park
Mountain Goat on colorful, precipitous terrain - Yellowstone National Park
American Bison plowing through the deep snow to forage for buried food. - Yellowstone National Park, Wyoming
Bighorn Sheep Ram - Yellowstone National Park
Pronghorn Antelope Doe - near Mammoth Hot Springs, Yellowstone National Park, Wyoming
Pair of Bighorn Sheep rams on snow-topped hill - Yellowstone National Park, Wyoming
Herd of bison in the midst of snowfall - Lamar Valley, Yellowstone National Park, Wyoming
