Why Yellowstone Bison Suddenly Look Like Spotted Cows in Thermal Video Spring Shedding Season in Lamar Valley Every spring in Yellowstone's Lamar Valley, something strange happens to the bison. For a few short weeks, America's largest land...

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There's a moment in early spring here in Lamar Valley when the land feels like it exhales. Snow begins to loosen its grip, the rivers swell, and across the rolling sage hills, the first movement returns—grizzly bears emerging from their dens. ...

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