Brent Stephenson / Northern giant petrel (Macronectes halli) moving through water, off Kaikoura, Canterbury, New Zealand, November.

Ernie Janes / Fulmar (Fulmaris glacialis) in flight with Hunstanton, Norfolk, England, UK, February.

Bryan and Cherry Alexander / Emperor penguins (Aptenodytes forsteri) colony, with Snow petrel (Pagodroma nivea) flying past and dark sky. Atka Bay. Antarctica

Bryan and Cherry Alexander / Chinstrap penguins (Pygoscelis antarctica) on a blue iceberg, with Antarctic Prion (Pachyptila desolata) flying over. Antarctica

Chris & Monique Fallows / Pintado petrel (Daption capense) flying in snow, Southern Ocean.

Chris & Monique Fallows / Pintado petrel (Daption capense) flock in flight, Southern Ocean.

Theo Bosboom / Fulmar (Fulmarus glacialis) above snowy lava beach near Djupivogur in the East of Iceland, March

Barrie Britton / Southern Giant Petrel (Macronectes giganteus), St Andrew's Bay, South Georgia. Photograph taken on location for the BBC Frozen Planet series, October 2009.

Andy Trowbridge / Southern Giant Petrel (Macronectes giganteus) in flight off the coast of Kaikoura, Kaikoura, South Island, New Zealand. February.

Pete Oxford / Southern Giant Petrels (Macronectes giganteus) feeding on the carcass of a Southern Elephant seal bull, killed by Killer whales. Sea Lion Island. South of mainland east Falkland Island. Falkland Islan...

Michael Pitts / Southern giant petrel (Macronectes giganteus) head covered in blood feeding on carcass of an Elephant seal pup, with a penguin colony in the distance, St Andrews Bay, South Georgia

Hanne & Jens Eriksen / Southern Giant Petrel {Macronectes giganteus} resting on rocks, Antarctica.