Edwin Giesbers / Wide angle close-up of a European grey wolf (Canis lupus) in landscape, captive, Norway, February.
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Edwin Giesbers / Wide angle close-up of two European grey wolves (Canis lupus), captive, Norway, February.
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Edwin Giesbers / Close-up portrait of a European grey wolf (Canis lupus), captive, Norway, February.
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Edwin Giesbers / European grey wolf (Canis lupus) in snow, captive, Norway, February.
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Jeff Wilson / Adult Arctic wolf (Canis lupus) Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer
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Jeff Wilson / Arctic wolf (Canis lupus) on tundra, Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer
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Jeff Wilson / Silhouette of Arctic wolf (Canis lupus) on sea ice, Ellesmere Island, Nunavut, Canada, June 2008. Taken on location for BBC series, Frozen Planet, Summer
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Jeff Wilson / Two Arctic wolves (Canis lupus) in tundra landscape, Ellesmere Island, Nunavut , Canada, June 2008, Taken on location for BBC series, Frozen Planet, Summer
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Thomas Mangelsen / Gray Wolf (Canis lupus) surveying the tundra, Denali National Park, Alaska
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Yva Momatiuk & John Eastcott / Gray Wolf (Canis lupus) juvenile, on colorful autumn tundra, Denali National Park, Alaska
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Jim Brandenburg / Arctic Wolf (Canis lupus) juvenile male babysitting pups, Ellesmere Island, Nunavut, Canada
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Jim Brandenburg / Arctic Wolf (Canis lupus) pack on ice field, Ellesmere Island, Nunavut, Canada
