Kathryn Jeffs / Tracks in snow of Adelie penguins (Pygoscelis adeliae) walking from coast to colony, Fish Island, Antarctica, February 2009, Taken on location for BBC Frozen Planet series
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Kathryn Jeffs / Adelie penguins (Pygoscelis adeliae) on ice floe, Antarctica. Taken on location for BBC Frozen Planet series, January 2009
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Kathryn Jeffs / Adelie penguins (Pygoscelis adeliae) on ice floe, Antarctica. Taken on location for BBC Frozen Planet series, January 2009
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Bryan and Cherry Alexander / Adelie penguin (Pygoscelis adeliae) on snow bank at Prospect Point with the mountains of Renaud Island beyond. Antarctica.
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Troels Jacobsen/Arcticphoto / Adelie Penguins (Pygoscelis adeliae) diving into the water, on their way out to sea to feed. Brown Bluff. Antarctic Peninsula.
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Charlie Summers / Adelie Penguin (Pygoscelis adeliae) flapping its flippers to cool down, Cuverville Island, Antarctica, November
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Nick Garbutt / RF- Adelie Penguin (Pygoscelis adeliae) on iceberg. Yalour Islands, Antarctic Peninsula, Antarctica. February. (This image may be licensed either as rights managed or royalty free.)
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Charlie Summers / Adelie penguin (Pygoscelis adeliae) hopping from ice block to ice block, Petermann Island, Antarctica
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Tim Laman / Adelie penguins (Pygoscelis adeliae) on iceberg, Antarctica, January
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Tim Laman / Porpoising Adelie penguin (Pygoscelis adeliae) reflected in water, Antarctica, January
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Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group diving off iceberg, Paulet Island, Antarctica
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Stephen Belcher / Adelie Penguin (Pygoscelis adeliae) jumping from iceberg, Antarctic Peninsula, Antarctica
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Andy Rouse / Adelie penguins (Pygoscelis adeliae) adult with chicks, Petermann Island, Antarctica (non-ex)
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Andy Rouse / Adelie penguin (Pygoscelis adeliae) adult looking curious, Petermann Island, Antarctica
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Kevin Schafer / Adelie Penguin (Pygoscelis adeliae) pair, Antarctica
Mary McDonald / Adelie penguin (Pygoscelis adeliae) greeting another at nest with two eggs, Antarctica.
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Konrad Wothe / Adelie Penguin (Pygoscelis adeliae) group running, Antarctica
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Brent Stephenson / Adelie penguin (Pygoscelis adeliae) feeding one of its chicks a meal of krill, Yalour Islands, Antarctic Peninsula, Antarctica, December.
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Sue Flood / Adelie penguins (Pygoscelis adeliae) young individuals go to sea at Brown Bluff, Antarctic Peninsula. January
Kevin Schafer / Adelie Penguin (Pygoscelis adeliae) carrying nesting rock, Antarctic Peninsula, Antarctica
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Brent Stephenson / Adelie Penguin (Pygoscelis adeliae) feet on ice, showing the strong claws. Yalour Islands, Antarctic Peninsula, Antarctica, January.
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Brent Stephenson / Adelie Penguin (Pygoscelis adeliae) brooding two small chicks. Yalour Islands, Antarctic Peninsula, Antarctica, December.
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Brent Stephenson / Adelie Penguin (Pygoscelis adeliae) stretching its flippers, showing the two eggs and bare brood patch. Yalour Islands, Antarctic Peninsula, Antarctica, December.
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Brent Stephenson / Adelie Penguin (Pygoscelis adeliae) walking back towards the sea from the rookery. Yalour Islands, Antarctic Peninsula, Antarctica, December.