Nurse visiting Yellowstone anxiously watches as men try to touch bison _ USA TODAY

Interesting Facts About American Bison - National Animal of USA

Bison Walks Away After Tourist Taunts Animal at Yellowstone National Park

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Full version USA National Park: USA National Park For Online

Bison Our National Mammal at Yellowstone National Park

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Bison herd thunders past tourists, shakes bridge in Yellowstone _ USA TODAY #Shorts

Bison in Yellowstone National Park

Bison charges at girl in Yellowstone National Park - BBC News

Don't Approach the Bison in Yellowstone National Park

Huge bison strolls through small town in Yellowstone National Park

Baby bison gets 'the zoomies' in Yellowstone National Park

Baby Bison Takes on Wolf and Wins America's National Parks

Bison Stampede Across Bridge in Yellowstone National Park

Canada reintroduces bison to its oldest national park

Idaho Man Arrested for Kicking Bison at Yellowstone National Park