TOM MANGELSEN / Male Resplendent quetzal (Pharomachrus mocinno) perched at its nest hole, El Triunfo Biosphere Reserve, Sierra Madre de Chiapas, Mexico.
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TOM MANGELSEN / Polar Bear (Ursus maritimus) portrait, Canada
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TOM MANGELSEN / Polar bear swimming with cubs {Ursus maritimus} Arctic
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TOM MANGELSEN / Peregrine falcon diving, Arctic. Peregrines are the fastest animals in the air, recorded at 200mph in a dive!
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TOM MANGELSEN / Mule deer (Odocoileus hemionus), female nuzzling young. Montana, USA
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TOM MANGELSEN / Polar bear watches Arctic fox Churchill. Canada
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TOM MANGELSEN / American bald eagles on perch (Haliaeetus leucocephalus) Alask
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TOM MANGELSEN / Moose by lake, Alaska (Alces alces) Denali NP US
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TOM MANGELSEN / Wild Grey wolf portrait, Denali NP (Canis lupus) Alaska
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TOM MANGELSEN / Polar Bear mother and cubs (Ursus maritimus) Churchill, Manitoba, Canada
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TOM MANGELSEN / Brown bear (Ursus arctos) Kodiak NP, Alaska
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TOM MANGELSEN / Stoat / Ermine in winter coat (Mustela erminea) Grand Teton NP Wyoming, USA
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TOM MANGELSEN / Siberian Tiger cub, orphaned (Panthera tigris altaica)
TOM MANGELSEN / Arctic Fox in snow, Canada. (Vulpes lagopus)
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TOM MANGELSEN / Arctic Fox sitting at sunset. Canada (Vulpes lagopus)
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TOM MANGELSEN / Arctic Fox on ice, Canada (Vulpes lagopus)
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TOM MANGELSEN / Arctic Fox sitting portrait, Canada (Vulpes lagopus)
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TOM MANGELSEN / Polar Bear resting on snow, Canada
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TOM MANGELSEN / Polar Bear,Canada (Ursus maritimus)
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TOM MANGELSEN / Bohemian waxwings eating berries (Bombycilla garrulus) Montana
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TOM MANGELSEN / Northern cardinal fluffed up in tree. (Cardinalis cardinalis) Montana
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TOM MANGELSEN / Coyote in snow in Yellowstone NP (Canis latrans) Wyoming, USA
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TOM MANGELSEN / Stoat / Ermine in winter coat by wood pile (Mustela erminea) Grand Teton NP, USA
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TOM MANGELSEN / Polar bears relaxing, Hudson Bay Canada
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TOM MANGELSEN / Polar bears, Canadian Arctic
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TOM MANGELSEN / Polar bears (Ursus maritimus) on ice at sunset. Hudson Bay, Canada.
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TOM MANGELSEN / Polar bear head portrait (Ursus maritimus) Hudson Bay, Canada
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TOM MANGELSEN / Dall sheep / Thinhorn sheep (Ovis dalli) two rams resting, Denali National Park, Alaska, USA.
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TOM MANGELSEN / Coyote (Canis latrans) travelling on a sand bar, in autumn with trees reflecting in Snake River, Oxbow Bend, Grand Teton National Park, Wyoming, USA.
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TOM MANGELSEN / Litter of Coyote (Canis latrans) pups emerging from den. Yellowstone National Park, Wyoming, USA, June.
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TOM MANGELSEN / Coyote (Canis latrans) walking through deep snow, Yellowstone National Park, Wyoming, USA. February.
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TOM MANGELSEN / Coyote (Canis latrans) walking in snow, Yellowstone National Park, Wyoming, USA. February.
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TOM MANGELSEN / Coyote (Canis latrans) with ears back standing in snow, Yellowstone National Park, Wyoming, USA. February.
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TOM MANGELSEN / Coyote (Canis latrans) portrait in snow, Yellowstone National Park, Wyoming, USA. February.
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TOM MANGELSEN / Coyote (Canis latrans) with standing in snow, Yellowstone National Park, Wyoming, USA. February.
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TOM MANGELSEN / Coyote (Canis latrans) carrying fish prey through snow, with standing in snow, Grand Teton National Park, Wyoming, USA. February.
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TOM MANGELSEN / Coyote (Canis latrans) standing on a charred fallen tree in patchy snow, Yellowstone National Park, Wyoming, USA. October.
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TOM MANGELSEN / Coyote (Canis latrans) standing in patchy snow, Yellowstone National Park, Wyoming, USA. October.
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TOM MANGELSEN / Coyote (Canis latrans) walking through snow along the Yellowstone River in Yellowstone National Park, Wyoming, USA. October.
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TOM MANGELSEN / Coyote (Canis latrans) pups playing near their den, Yellowstone National Park, Wyoming, USA. June.
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TOM MANGELSEN / Coyote (Canis latrans) female standing on boulders, Yellowstone National Park, Wyoming, USA. June.
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TOM MANGELSEN / Coyote (Canis latrans) pup standing in grass, Yellowstone National Park, Wyoming, USA. June.
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TOM MANGELSEN / Coyote (Canis latrans) female walking away from nursing pups, Yellowstone National Park, Wyoming, USA, June.
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TOM MANGELSEN / Coyote (Canis latrans) female nursing pups, Yellowstone National Park, Wyoming, USA, June.
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TOM MANGELSEN / Horned guan (Oreophasis derbianus) standing in a tree, El Triunfo Biosphere Reserve, Sierra Madre de Chiapas, Mexico.
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TOM MANGELSEN / Male Resplendent quetzal (Pharomachrus mocinno) at nest hole, El Triunfo Biosphere Reserve, Sierra Madre de Chiapas, Mexico.
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TOM MANGELSEN / Portrait of a male Resplendent quetzal (Pharomachrus mocinno) perched on a branch, El Triunfo Biosphere Reserve, Sierra Madre de Chiapas, Mexico.