Bison, Yellowstone National Park, Wyoming, USA
A small herd of bison roams the Lamar Valley in the dead of winter. By using their broad heads as shovels, the bison are able to reach grasses buried beneath deep snow.
© Art Wolfe/ Art Wolfe Stock
Rights: All images copyright (c) Art Wolfe. All rights reserved. Do not reproduce in whole or in part without prior written permission.
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