Sue Flood / Emperor penguin (Aptenodytes forsteri) chick flapping wings, Snow Hill Island rookery, Weddell Sea, Antarctica. November.

Sue Flood / Emperor penguin (Aptenodytes forsteri) walking with young chick at Snow Hill Island rookery, Antarctica. October.

Sue Flood / Emperor penguins (Aptenodytes forsteri) with young chick at Snow Hill Island rookery, Antarctica. October.

Sylvain Cordier / Emperor penguin (Aptenodytes forsteri), chick in brood pouch of parent, Snow Hill Island, Antarctic Peninsula

David Tipling / Emperor Penguin (Aptenodytes forsteri) walking across the sea ice of Weddell Sea, near Snow Hill Island, Antarctica, November

David Tipling / Kapitan Klebnikov, an ice breaker, growing through ice in the Weddell Sea near Snow Hill Island, Antarctica, November 2006

David Tipling / Emperor Penguins on sea ice with Kaptan Klebnikov ice breaker in background, Snow Hill Island, Antarctica, November

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.

Bryan and Cherry Alexander / Emperor penguin (Aptenodytes forsteri) chick by a line of photographers. Snow Hill Island, Antarctica, October.

Bryan and Cherry Alexander / Emperor penguin (Aptenodytes forsteri) chick leaning on parent, Snow Hill Island, Antarctica, October.

Bryan and Cherry Alexander / Emperor penguin (Aptenodytes forsteri) chick begging hard for food from a parent. Snow Hill Island, Antarctica, October.

Bryan and Cherry Alexander / Four Emperor penguin (Aptenodytes forsteri) chicks with an adult at Snow Hill Island colony. Antarctica, October.