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10th Annual Smithsonian Magazine Photo Contest Natural World
American Bison butt heads in Yellowstone in the middle of winter.

American Bison butt heads in Yellowstone in the middle of winter.

Photo Detail
Date Taken: 12.2011
Date Uploaded: 11.2012
Photo Location: Wyoming, United States of America
Camera: Canon EOS 5D Mark II
Copyright: © Cindy Tucey
Awards
Editor's Pick