Yellowstone National Park, January 2019: Bighorn in the Lamar Valley, Yellowstone National Park, January 30, 2019. [#9752-9267] Click on image for next photo. This image available for licensing through: iStock by Getty Images.

Bighorn in the Lamar Valley, Yellowstone National Park, January 30, 2019.  Click for next photo.

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All photos 1998-2019 by Thomas O'Neil