Yellowstone Bison

Yellowstone National Park, Wyoming

Thunder Snow

Grand Teton National Park, Wyoming

Fox in Snow

Grand Teton National Park, Wyoming

Lion Cub

Captive; Denver Zoo, Colorado

Bighorn Sheep

National Elk Refuge, Wyoming

Tasty

Grand Teton National Park, Wyoming

Bugling Elk

Rocky Mountain National Park, Colorado

Bison in Aspen

Grand Teton National Park, Wyoming

Pas De Deux

Captive; Denver Zoo, Colorado

Pronghorn Buck and Fawn

Grand Teton National Park, Wyoming

Svalbard Walrus

Svalbard

Go With the Floe

Jökullsarlon Ice Lagoon, Iceland