Stefan Christmann / Emperor penguins (Aptenodytes forsteri) silhouetted at sunset, Atka Bay, Queen Maud Land, Antarctica. October.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri), four journeying across sea ice to feed young. Atka Bay, Antarctica. August.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri) walking across crack in sea ice during return to breeding colony. Atka Bay, Antarctica. April.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri) sliding across sea ice in journey to breeding colony. Sastrugi in ice formed by wind erosion. Atka Bay, Antarctica. April.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri), three in a row, walking through drifting snow to feed young. Atka Bay, Antarctica. September.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.
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Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group in procession across ice shelf to provide food for young. Atka Bay, Antarctica. September 2017.
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Guy Edwardes / The Dark Hedges, Stranocum, Co. Antrim, Northern Ireland, September 2010.
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Ingo Arndt / Rear view of Horseshoe crab (Limulus polyphemus) with trail in sand, Delaware Bay, Delaware, USA, May
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Wim van den Heever / Gemsbok (Oryx gazella) two walking across sand dunes, aerial view. Namibia.
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Brent Stephenson / Young Polar bear (Ursus maritimus) walking across melting sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.
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Arne Hodalic / Nenet herdsman with Reindeer (Rangifer tarandus) during summer migration, Yamal Peninsula, Russia. May.
