Yellow-pine Chipmunk Peeks Over Rock, Bison Range, Wyoming (Chipmunks)

Yellow-pine Chipmunk, Bison Range, Wyoming (Chipmunks)

Yellow-belled Marmot, Mission Valley, California (Marmots)

Bighorn Ram, Yellowstone, WY (Bighorn Rams)

Trio of Bighorn Sheep, Yellowstone, WY (Bighorn Sheep)

Musk Ox Mother and Calf, Nome, Alaska (Muskox, Musk Oxen)

Red Squirrel in Spring, New York (Red Squirrel)

Musk Ox Mother and Calf, Nome, Alaska (Muskox, Musk Oxen)

Red Squirrel in Spring, New York (Red Squirrel)

Gray Squirrel in Spring. New York (Gray Squirrels)