Chadden Hunter / Aerial view of Timber wolves (Canis lupus) attacking a Bison calf (Bison bison) on the Arctic circle in Northern Canada. Taken on location for BBC Frozen Planet series, 2009
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Chadden Hunter / Aerial view of hunting pack of Timber wolves (Canis lupus) in Arctic circle in Northern Canada, Taken on location for BBC Frozen Planet series, 2009
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Pal Hermansen / View from aboard ice-breaker 'Kapitan Dranitsyn' to land, Franz Josef Land, Russia 2004.
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Chadden Hunter / Aerial view of pack of Timber wolves (Canis lupus) after successful Bison (Bison bison) hunt, Arctic circle in Northern Canada. Taken on location for BBC Frozen Planet series, 2009
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Chadden Hunter / Aerial view of hunting pack of Timber wolves (Canis lupus) in Arctic circle in Northern Canada, Taken on location for BBC Frozen Planet series, 2009
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Martha Holmes / Huskies huddled together after eating, Admiralty Inlet, Canadian Arctic
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Martha Holmes / Inuit's husky dogs eating seal meat after successful hunt, Admiralty Inlet, Canadian Arctic
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Doug Allan / Husky doy team at campsite on sea ice, Lancaster Sound, Canadian Arctic
