The frosty face is a result of the bison moving massive amounts of snow with their large face and head to find the grass below. This guy is pushing the snow into the river.
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From Bison in Yellowstone Winter 2017
Portrait of a bison.
This fella looks pretty healthy and will most likely survive the winter. Many don't.
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Up Close and Personal
This fella was just across the road pushing the snow around with his face looking for lunch.
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A herd of bison forage deep in the snow for grass.
From Yellowstone in Winter
Shoveling through the shoulder deep snow for a patch of old grass below.
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The deep snow shows the harsh winters these animals face.
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Spring in Teton
A young bison calf stays close to mama.
Wolves and bears are the greatest threats to the calves or older bison.
A herd of bison forage on sparse vegetation in front of the majestic Teton mountains.
A frosty face is a result of foraging deep under the snow for grass.
Painterly Frosty Face
Girls On The Move
These bison cows commandeered the road as they moved on to different feeding grounds. Can you spot the pregnant belly?
From Home Page Collection
Portrait of a Bison
Portrait of a Bison Monochrome
Portrait of a Bison in Monochrome
Those aren't gray hairs. It's the frosty face of a bison who has been foraging for grass beneath the snow.
Waiting My Turn - How Long Can I Keep My Legs Crossed?
This bison found some easy grass to forage. Unfortunately for me, it was a bit too close to the toilet. I don't think I have to go that bad!
A Common Scene in Yellowstone
Bison often take to the roads just as we do for ease of traveling, and when they do, they have the right of way.
Bison Cow in Teton National Park
The winter sun warms the back of this pretty bison cow as she forages for grass buried deep below the surface of the snow.
From Winter Wildlife