Yellowstone National Park, Wyoming
1997
Joel Sartore

A lone red fox picks through the snow in Yellowstone National Park. Unlike the pack-forming gray wolves in the park, red foxes are solitary and occupy home ranges that may be shared with only one or two members of the opposite sex.

(Photograph shot on assignment for, but not published in, "Return of the Gray Wolf," May 1998, National Geographic magazine)

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