A herd of bison stand in green grass with low mountains in the background.
Bison, Lamar Valley
Keywords: yellowstone national park; mammals; wildlife; bison; bison bison; 20160818_ndh-yell-9799
Lamar Valley earns its nickname — America's Serengeti — on mornings like this. Arrive at dawn and you'll often find bison herds stretching to the horizon, with wolves and grizzlies working the same ground in the distance. It's the kind of scene that makes you forget you had a schedule. © Neal Herbert, Public domain, via Wikimedia Commons

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