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Herd of bison or buffalo crossing bridge in the Yellowstone Ecosystem in Wyoming, in northwestern USA. Nearest cities are Gardiner, Cooke City, Bozeman and Billings Montana, Denver, Colorado, Salt Lake City, Utah and Jackson, Wyoming.

$Yellowstone is a winter wonderland, to watch the wildlife and natural landscape. \nYellowstone National Park, Wyoming and Montana. Northwest. Bison. Buffalo.$

A bison walks along a snow covered road in Yellowstone National Park

A group of bison roam the Hayden Valley in Yellowstone NP.

Young Bighorn Sheep foraging for food in a snow covered field near Jackson, Wyoming

American Bison Buffalo Next to River, Yellowstone National Park

American bison in the snow in Yellowstone National Park trying to find food under the snow. Moving the snow away with their head. Head with snow on face.

A bull bison, head on, during a winter storm in Yellowstone National Park, Montana/ Wyoming.

Bison or buffalo with new calf walking to find springtime grass to eat in the Yellowstone Ecosystem in Wyoming and Montana, in northwestern USA. Nearest cities are Gardiner, Cooke City, Bozeman and Billings Montana, Denver, Colorado, Salt Lake City, Utah and Jackson, Wyoming.

Big Horn sheep going up a hill in Yellowstone's Lamar Valley

$Bison bull and cow grazing on the plains of Yellowstone National Park.\n\nTaken in Yellowstone National Park, Wyoming, USA$

Close-up image of an American Bison roaming wild in the Yellowstone National Park

An American Bison (bison bison), with snow and frost on his face, walks through the snow and bare trees.

Mountain goat doing its thing in Yellowstone National Park

Bear cub and mother crossing road in Yellowstone

Young Grizzly bear looking at camera on snow bank in forest in the Yellowstone Ecosystem, Wyoming, USA, North America.

American Bison Yellowstone in National Park snowing in winter

A herd of bison grazing in the Lamar Valley in Yellowstone National Park. Some bison are fighting, some others rolling in the sand, with dust flying around.

Bison grazing on grass with bird on it's back at Yosemite

$Elk are the most abundant large mammal found in Yellowstone and are an important species within the Greater Yellowstone Ecosystem.\n Elk comprise approximately 85% of winter wolf kills and are an important food for bears, mountain lions, and at least 12 scavenger species. Elk are one of the most photographed animals in Yellowstone$