Steven Kazlowski / Two curious young Polar bears (Ursus maritimus), Barter Island, off the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011
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Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...
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Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...
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Steven Kazlowski / Young Polar bear (Ursus maritimus) standing and trying to balance in shallow water along the Bernard Spit, 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, Oc...
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Andy Rouse / Polar Bear (Ursus maritimus) portrait in sea-ice landscape. Wide angle / fish-eye shot. Svalbard, Norway, September.
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Steven Kazlowski / Polar bear (Ursus maritimus) on sea ice, off the coast of Svalbard, Norway
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Steven Kazlowski / Polar bear (Ursus maritimus) mother with cub, newly emerged from their den on the Arctic coast, eastern Arctic National Wildlife Refuge, Alaska
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Terry Andrewartha / Polar bear walking {Ursus maritimus} Hudson Bay Canada
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Sue Flood / Polar bear footprint in snow {Ursus maritimus} Churchill Canada
Doug Allan / Polar bear (Ursus maritimus) male well fed, jumping over a crack in the melting pack ice before sniffing and tasting the air, Svalbard, July, 2015.
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Steven Kazlowski / Polar bear (Ursus maritimus) small cubs walking on pack ice, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Polar bear (Ursus maritimus) sow with cub resting on newly formed pack ice, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Polar bear (Ursus maritimus) sow with cubs travelling along barrier island, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. September.
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Steven Kazlowski / Polar bear (Ursus maritimus) cub walking across snow covered pack ice, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Polar bear (Ursus maritimus) sow with cubs walking along coast during fall freeze up, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Polar bear (Ursus maritimus) sow with cub walking across newly formed pack ice, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Polar bear (Ursus maritimus) cub walking across newly formed pack ice, off 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Adult Polar bear (Ursus maritimus) taking refuge and resting in icy eroding permafrost while waiting for fall freeze up, 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October 201...
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Steven Kazlowski / Adult Polar bear (Ursus maritimus) silhouetted at sunrise along barrier island, off 1002 coastal plain of Arctic National Wildlife Refuge, Barter Island, Alaska, USA. October.
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Steven Kazlowski / Polar bear (Ursus maritimus) cubs standing and playing with one another, 1002 coastal plain of Arctic National Wildlife Refuge, Alaska, USA. October.
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Steven Kazlowski / Adult Polar bear (Ursus maritimus) walking along barrier island with ice rainbow in distance, off 1002 coastal plain of Arctic National Wildlife Refuge, Barter Island, Alaska, USA.Cropped. August.
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Steven Kazlowski / Curious adult Polar bear (Ursus maritimus) investigating camera along barrier island, off 1002 coastal plain of Arctic National Wildlife Refuge, Barter Island, Alaska, USA. August.
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Pal Hermansen / Female Polar bear (Ursus maritimus) with a radio collar for scientific tracking, walking across floating ice sheets and jumps across sea channel, Hornsund, South Spitsbergen National Park, Svalbard, N...
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Ole Jorgen Liodden / Polar bear (Ursus maritimus) walking on drifting sea ice. Svalbard, Norway.
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Ole Jorgen Liodden / Polar bear (Ursus maritimus) on drifting ice floe. Svalbard, Norway.
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Jenny E. Ross / Polar bear (Ursus maritimus) cubs, age 2-3 months, in den, Wapusk National Park, Manitoba, Canada. March.
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Danny Green / Polar bear (Ursus maritimus) female and cubs play fighting. Svalbard, Norway, March 2018.
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Danny Green / Polar bear (Ursus maritimus) two walking in snowy landscape with glacier behind. Svalbard, Norway, April 2018.
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Danny Green / Polar bear (Ursus maritimus) male female pair looking upwards, snow covered hills in background. Svalbard, Norway, April 2018.
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Danny Green / Polar bear (Ursus maritimus) group on ice, female and cubs feeding on Whale carcass. Svalbard, Norway, June 2018.
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Danny Green / Polar bear (Ursus maritimus) resting on sea ice, view from above. Svalbard, Norway, June 2018.
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Danny Green / Polar bear (Ursus maritimus) sleeping in snow. Churchill, Manitoba, Canada, November.
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Danny Green / Polar bear (Ursus maritimus) hunting Seal on sea ice. Svalbard, Norway, July 2018.
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Danny Green / Polar bear (Ursus maritimus), two cubs playing, leaping across sea ice, reflected in water. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus), two cubs walking on sea ice. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) cub ready to jump down from pack ice. Svalbard, Norway, April.
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Danny Green / Polar bear (Ursus maritimus) walking across sea ice, reflected in water. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) female resting with cubs on glacier. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) female and cubs feeding on Whale carcass. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) and two cubs feeding on Whale carcass. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) and cubs, standing on sea ice. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) and cubs resting on sea ice. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) female and cubs, one cub walking up slope of ice in foreground. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) and cubs feeding on Whale carcass. Svalbard, Norway, July.
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Danny Green / Polar bear (Ursus maritimus) and cubs feeding on Whale carcass, on iceberg. Svalbard, Norway, July 2018.
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Danny Green / Polar bear (Ursus maritimus) walking across ice, snow covered mountain in background. Svalbard, Norway, April 2018.