David Tipling / Snow petrel (Pagadroma nivea nivea) flying around Iceberg off South Georgia, Southern Ocean January

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.

Tui De Roy / White-vented storm petrel (Oceanites gracilis galapagoensis) 'walking' on surface of water whilst foraging, Galapagos

Graeme Guy / Pintado Petrel (Daption capense) flying, South Island, New Zealand

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.

Markus Varesvuo / Wilson's Storm Petrel (Oceanites oceanicus) feeding whilst 'walking on water' Atlantic ocean, Madeira Portugal, August