Frederique Olivier / Killer whale (Orcinus orca) amongst thick pack ice, Antarctica. Taken on location for the BBC series, Frozen Planet.
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Frederique Olivier / Young Emperor penguins (Aptenodytes forsteri) jumping off ice floes, Antarctica, February 2011.
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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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Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarcticus) and Snowy sheathbill (Chionis alba) on snowy rocks. Half Moon Island, South Shetland Islands, Antarctica, October.
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Bryan and Cherry Alexander / Emperor penguin (Aptenodytes forsteri) chicks playing with a piece of ice as they wait for their next meal. Snow Hill Island, Antarctica, October.
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Bryan and Cherry Alexander / Emperor penguin (Aptenodytes forsteri) chick leaning on parent, Snow Hill Island, Antarctica, October.
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Bryan and Cherry Alexander / Four Emperor penguin (Aptenodytes forsteri) chicks with an adult at Snow Hill Island colony. Antarctica, October.
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Bryan and Cherry Alexander / Two Emperor penguin (Aptenodytes forsteri) chicks walk away from the camera. Snow Hill Island. Antarctica, October.
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Bryan and Cherry Alexander / Curious Emperor penguin (Aptenodytes forsteri) chicks with adults in the Snow Hill Island colony. Antarctica, October 2006.
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Troels Jacobsen/Arcticphoto / A group of Rockhopper Penguins (Eudyptes chrysocome). The world population of Northern Rockhopper has declined by 90% in the past 60 years. Quest Bay, Gough Island. UNESCO World Heritage site, March.
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Bryan and Cherry Alexander / Line of Emperor penguins (Aptenodytes forsteri) walking on sea ice. Flutter Rookery, East Antarctica.
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Tim Laman / Killer whale (Orcinus orca) female and young at surface, Antarctica, February
