Markus Varesvuo / Fulmar (Fulmarus glacialis) flying over Icelandic ponies, Iceland, June

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.

Danny Green / Fulmer (Fulmras glacialis) in flight near blue glacier, Svalbard, July. Bookplate from Danny Green's 'The Long Journey North'

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

Orsolya Haarberg / Northern fulmar (Fulmarus glacialis) below a black-legged kittiwake (Rissa tridactyla). The optical phenomenon, caused by a backscattering of light, is called a glory. Hornstrandir Nature Reserve, Ice...

David Tipling / Northern Fulmar (Fulmarus glacialis) flying along cliff at Sumburgh Head in evening light, Shetland, Scotland, June

Danny Green / Fulmar (Fulmarus glacialis) on sea at base of iceberg. Svalbard, June.

Peter Cairns / Fulmar (Fulmarus glacialis) in flight in front of Skogafoss waterfall, Iceland, June

Hanne & Jens Eriksen / Jouanin's petrel (Bulweria fallax) in flight, Oman, September

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

Erlend Haarberg / Northern fulmar (Fulmarus glacialis) in flight in snow storm, Iceland, April

Erlend Haarberg / Northern fulmar (Fulmarus glacialis) with optical glory phenomenon in mist, Hornvik, Hornstrandir Nature Reserve, West Fjords, Iceland, July 2008