Nick Garbutt / Flock of Kelp / Southern black backed Gulls (Larus dominicanus) flying over iceberg. Graham Passage, Antarctic Peninsula, Antarctica. February. (digitally altered image)

Barry Bland / Buller's Gull {Chroicocephalus bulleri} in flight. New Zealand

Brent Stephenson / Southern black backed / kelp gull (Larus dominicanus) in flight low over the sea with a wave behind, off Kaikoura, Canterbury, New Zealand

Brent Stephenson / Kelp Gull (Larus dominicanus) chick amongst old whaling equipment. Deception Island, South Shetland Islands, Antarctica, January.

Brent Stephenson / Kelp Gull (Larus dominicanus) in flight against a blue sky. Ushuaia, Southern Argentina, South America, January.

Brent Stephenson / Kelp gull (Larus dominicanus) in flight against the sea. Ushuaia, Southern Argentina, South America, January.

Brent Stephenson / Kelp Gull (Larus dominicanus) in flight. Neko Harbour, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Kelp Gull (Larus dominicanus) in flight looking down. Neko Harbour, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Kelp Gull (Larus dominicanus) perched on a rock whilst snowing. Paradise Bay, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Kelp Gull (Larus dominicanus) landing on a rock. Port Lockroy, Antarctic Peninsula, Antarctica, December.

Brent Stephenson / Immature Kelp / Southern Black Backed Gull (Larus dominicanus) in flight against a blue sky. Off Kaikoura, Canterbury, New Zealand, October.

Kathryn Jeffs / Large flock of Southern black backed gulls / Kelp gulls (Larus dominicanus) Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Ernie Janes / Kelp / Southern black backed gull (Larus dominicanus) calling, New Zealand, February

Bryan and Cherry Alexander / Pair of Kelp/Dominican/Southern black backed gulls (Larus Dominicanus) on a snowy rock. Antarctica, October.

Brent Stephenson / Kelp / Southern Black-backed Gull (Larus dominicanus) in flight from above showing upperwing. Muriwai, Auckland, New Zealand, December.

Brent Stephenson / Southern Black Backed / Kelp Gull (Larus dominicanus) chick and egg in nest. The chick is newly hatched and the egg-tooth can still be seen. Ngaruroro River, Hawkes Bay, New Zealand, November.

Charlie Summers / Southern Black-backed / Kelp Gull (Larus dominicanus) in flight

Kevin Schafer / Kelp Gull (Larus dominicanus) waiting for scraps left by two Marine otters (Lontra felina) Chiloe Island, Chile, Endangered species

Eric Baccega / Kelp / Southern black backed gull (Larus dominicanus) in flight, Kerguelen Island, Sub-antarctic, Territory of the French Southern and Antarctic Lands, December

Eric Baccega / Kelp / Southern black backed gull (Larus dominicanus) in flight, Kerguelen Island, Sub-antarctic, Territory of the French Southern and Antarctic Lands, December

Tim Laman / Kelp / Southern black backed gull (Larus dominicanus) standing on one leg in snow, Antarctica, January

Doug Allan / Kelp / Southern black backed gulls (Larus Dominicanus) Detaille Island, Antarctic peninsula. February 2009.

Andrew Walmsley / Black backed gull (Larus dominicanus) perched on a rock, Kaikoura, New Zealand, July

Tom Marshall / Southern black backed gull (Larus dominicanus) on beach, Avon-Heathcote Estuary, South Island, New Zealand

Tom Marshall / Black backed gull {Chroicocephalus bulleri} adult in river bed, Ashley River, Canterbury, New Zealand, December

Edwin Giesbers / Kelp / Southern black backed gull {Larus dominicanus} pair, Antarctica

Barry Bland / Southern Black Backed Gull {Larus dominicanus} head profile, New Zealand

Barry Bland / Black billed Gull {Chroicocephalus bulleri} New Zealand

Richard Du Toit / Southern black backed / Kelp gulls {Larus dominicans} Robberg NR, South Africa

Patricio Robles Gil / Southern black backed / Kelp gull + two chicks at nest {Larus dominicans} Antarctica

Richard Du Toit / Southern black backed / Kelp gull taking off {Larus dominicans} South Africa

Patricio Robles Gil / Southern black backed / Kelp gull + two chicks at nest {Larus dominicans} Antarctica

Ben Osborne / Southern black backed gull flying in front of waves {Larus dominicans} Falkland Is

Ben Osborne / Southern black backed gull {Larus dominicans} catching crab from surf. Falkland Is

Ben Osborne / Southern black backed gull flying in front of waves {Larus dominicans} Falkland Is

Ben Osborne / Southern black backed gull {Larus dominicans} catching crab from surf. Falkland Is

Ben Osborne / Southern black backed gull flying in front of waves {Larus dominicans} Falkland Is

Pete Oxford / Southern black backed gulls scavenging on refuse tip, Port Stanley, Falkland Islands, Antarctic.

Pete Oxford / Southern black backed gulls scavenging on rubbishtip, Port Stanley, Falkland Islands, Antarctic.

Tony Heald / Southern black backed / Kelp gulls scavenging {Larus dominicans} False bay, S Africa

Tony Heald / Southern black backed / Kelp gull scavenging dead seal {Larus dominicans} False Bay, South Africa

Richard Du Toit / Southern black backed / Kelp gull drops mussel to open shell {Larus dominicans} South Africa

Richard Du Toit / Southern black backed (Kelp) gull {Larus dominicans} Robberg NR, South Africa

Richard Du Toit / Southern black backed (Kelp) gulls {Larus dominicans} and Cormorants on beach, Robberg NR, South Africa

Bryan and Cherry Alexander / Kelp / Southern black backed Gull (Larus dominicanus) hovering over harbour with a backdrop of colourful houses. Ushuaia, Argentina.

Barry Bland / Southern black-backed gull (Larus dominicanus) in flight over water, New Zealand.

Pete Oxford / Southern black backed gulls {Larus dominicans} on tip, Port Stanley, Falkland Is

Gabriel Rojo / Southern black backed (Kelp) gull diving {Larus dominicans} Valdez, Patagonia, Argentina

Gabriel Rojo / Southern black backed (Kelp) gull flying {Larus dominicans} Valdez, Patagonia, Argentina

Gabriel Rojo / Southern black backed (Kelp) gulls fishing {Larus dominicans} Valdez, Patagonia, Argentina

Ben Osborne / Southern black backed gull {Larus dominicans} catching crab from surf. Falkland Is