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Arctic Mammals

Pacific walruses (Odobenus rosmarus divergens) maneuver for position at a small crowded haul-out on Arakamchechen Island in the Bering Sea, Russia.

Pacific walruses (Odobenus rosmarus divergens) maneuver for position at a small crowded haul-out on Arakamchechen Island in the Bering Sea, Russia.

An adult female harp seal (Pagophilus groenlandicus) surfaces in a breathing hole she has maintained in the floating pack ice of the Gulf of St. Lawrence, near where her young pup is resting on the ice. A young harp seal pup (Pagophilus groenlandicus) rests on the sea ice where it was born. The pup is less than two weeks old. A harp seal (Pagophilus groenlandicus) mother with her young "white-coat" pup, on the sea ice where the pup was born. The pup is less than 15 days old. Twin polar bear cubs (Ursus maritimus), about three months old, inside a snow den. Polar bear maternity denning area, Wapusk National Park, Western Hudson Bay, Manitoba, Canada. An Atlantic walrus (Odobenus rosmarus rosmarus) mother and her calf rest on on sea ice in the Barents Sea near Stoliczka Island in Franz Josef Land, Russia. Atlantic walruses (Odobenus rosmarus rosmarus) swimming as a herd in northern Novaya Zemlya, where the Barents Sea and Kara Sea meet, in the Russian High Arctic. An adult Atlantic Walrus (Odobenus rosmarus rosmarus) surfaces to breath while swimming in the Arctic Ocean near Lagoya Island in the Svalbard Archipelago, Norway. A young Arctic fox (Alopex lagopus), in dark summer pelage, crosses a fast-moving stream to hunt for black-legged kittiwakes (Rissa tridactyla) where the birds have a nesting colony in Diskobukta on Edgeoya in the Svalbard Archipelgo, Norway. A young Arctic fox (Alopex lagopus), in dark summer pelage, carrying a fledgling black-legged kittiwake (Rissa tridactyla) it has just killed at a seabird colony in Diskobukta on Edgeoya in the Svalbard Archipelago, Norway. An adult Arctic fox (Alopex lagopus), in dark summer pelage, carrying a fledgling black-legged kittiwake (Rissa tridactyla) it has just killed at a seabird colony in Diskobukta on Edgeoya in the Svalbard Archipelago, Norway. An adult Arctic fox (Alopex lagopus), in dark summer pelage, carrying a fledgling black-legged kittiwake (Rissa tridactyla) it has just killed at a seabird colony in Diskobukta on Edgeoya in the Svalbard Archipelago, Norway. Harbor seals (Phoca vitulina) at Virgohamna on Danskoya, Svalbard A bearded seal (Erignathus barbatus) resting on a small iceberg near the receding glacier front of Hamiltonbreen in Hamiltonbukta, Spitsbergen, Svalbard. Two large, mature adult male polar bears (Ursus maritimus) confront one another on the sea ice at a seal kill site. Arctic Ocean north of the Svalbard Archipelago, near 81-degrees North. Steller sea lions (Eumetopias jubatus) swimming in the Bering Sea, Russia. Pacific Walruses (Odobenus rosmarus divergens) hauled out and jammed together on a very small stretch of rocky shore backed by nearly-shear cliffs on Wrangel Island in the Chukchi Sea (Arctic Ocean), Russia. Pacific Walruses (Odobenus rosmarus divergens), including mothers with calves, hauled out and jammed together on a very small stretch of rocky shore backed by nearly-shear cliffs on Herald Island in the Chukchi Sea (Arctic Ocean), Russia. An adult Atlantic Walrus (Odobenus rosmarus rosmarus) surfaces to breath while swimming in the Arctic Ocean near Lagoya Island in the Svalbard Archipelago, Norway. An adult Atlantic Walrus (Odobenus rosmarus rosmarus) in the Arctic Ocean near the shore of Lagoya Island in the Svalbard Archipelago, Norway. An adult Svalbard reindeer (Rangifer tarandus platyrhynchus) on autumn tundra. A reindeer antler (Rangifer tarandus) lying on the Arctic tundra, Wrangel Island, Russia. Svalbard reindeer (Rangifer tarandus platyrhynchus) jumping as it travels across the tundra at Eidembukta on Spitsbergen, Svalbard. An adult male polar bear (Ursus maritimus) lies on sea ice while "still-hunting" -- waiting for an opportunity to grab a seal as it surfaces to breathe. Hudson Bay, Manitoba, Canada. An adult male polar bear (Ursus maritimus) "still-hunting" on sea ice -- waiting for an opportunity to grab an unsuspecting seal as it surfaces to breathe. Arctic Ocean north of the Svalbard Archipelago, near 81-degrees North. Adult male polar bears (Ursus maritimus) sparring playfully on sea ice. Hudson Bay, Manitoba, Canada. An adult polar bear (Ursus maritimus) swims stealthily among floes of ice in Svalbard, Norway. An adult Arctic fox (Vulpes lagopus), in white winter pelage, resting in snow near the shore of Hudson Bay at sunset. An adult Arctic hare (Lepus arcticus), well-camouflaged in its white winter pelage, hunkers down during a snowstorm, next to a boulder for protection from the wind. An adult male hooded seal (Cystophora cristata) on sea ice. He has inflated the bladder characteristic of the species -- the "hood," an elastic inflatable sac -- which extents from his nose to his forehead on top of his head. A newborn hooded seal pup (Cystophora cristata) lies next to its mother on the floating sea ice where the pup was born. Pacific walruses (Odobenus rosmarus divergens) maneuver for position at a small crowded haul-out on Arakamchechen Island in the Bering Sea, Russia. A Pacific walrus (Odobenus rosmarus divergens) at a small crowded haul-out on Arakamchechen Island in the Bering Sea, Chukotka, Russia. Pacific walruses (Odobenus rosmarus divergens) maneuver for position at a small crowded haul-out on Arakamchechen Island in the Bering Sea, Russia.