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

Ann & Steve Toon / Kelp (Cape) gulls (Larus dominicanus) feeding on Cape fur seal carcass, Western Cape, South Africa.

Stefan Christmann / Kelp gull (Larus dominicanus) in flight. Atka Bay, Antarctica. January.

Emanuele Biggi / Black-backed jackal (Canis mesomelas), adult individual eating a dead kelp gull. Cape Cross cape ful seal colony, Namibia

Lucas Bustamante / Brown fur seal (Arctocephalus pusillus) colony sleeping with Kelp gull (Larus dominicanus) feeding on carcass of dead pup, Cape Cross, Erongo, Namibia.

Rick Price / Two Humpback whales (Megaptera novaeangliae) breathing at the surface with Dominican gulls (Larus dominicanus), Charlotte Bay, Portal Point, Antarctic Sound, Antarctica.

Rick Price / Humpback whale (Megaptera novaeangliae) breathing at the surface with Dominican gulls (Larus dominicanus), Charlotte Bay, Portal Point, Antarctic Sound, Antarctica.

Richard Robinson / Southern black backed gull (Larus dominicanus) in flight, Enderby Island in the subantarctic Auckland Islands archipelago, New Zealand, January Editorial use only.

Richard Robinson / Southern black backed gull (Larus dominicanus) chick at Enderby Island in the subantarctic Auckland Islands archipelago, New Zealand, January Editorial use only.

Chris & Monique Fallows / Great white shark (Carcharodon carcharias) which is eating a Cape fur seal under the water, with a Kelp gull (Larus dominicanus) flying over scavenging, Seal Island, False Bay, South Africa, June.

Ann & Steve Toon / Kelp gulls (Larus dominicanus) scavenging potato factory waste, Lambert's Bay, Western Cape, South Africa

Brent Stephenson / Kelp gull (Larus dominicanus) flying, Cape Kidnappers, Hawkes Bay, New Zealand, November.

Brent Stephenson / Kelp gull (Larus dominicanus) flying, off Whitianga, Coromandel, New Zealand, October.

Cyril Ruoso / Kelp gull (Larus dominicanus) profile, Peru.

Chris Mattison / Kelp gull (Larus domicanus) perched on rock, Caldera, Chile.

Juan Carlos Munoz / Kelp gull (Larus dominicanus) on rocky shore with crashing waves at sunset, Bird Island, Lambert's Bay, Western Cape province, South Africa, September 2012.

Gabriel Rojo / Southern right whale (Eubalaena australis) at surface with Kelp gull (Larus dominicanus) Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Kelp gull (Larus dominicanus) swimming and South American sea lions (Otaria flavescens) at the surface. Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Southern right whale (Eubalaena australis) at surface with Kelp gull (Larus dominicanus) Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Kelp gulls (Larus dominicanus) in flight, Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Southern right whale (Eubalaena australis) at surface with Kelp gulls (Larus dominicanus) Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Southern right whale (Eubalaena australis) at surface with Kelp gull (Larus dominicanus) Valdes Peninsula, Chubut, Patagonia, Argentina.

Gabriel Rojo / Southern right whale (Eubalaena australis) blowing / spouting with Kelp gull (Larus dominicanus) in flight above. Valdes Peninsula, Chubut, Patagonia, Argentina.

Brent Stephenson / Adult Kelp gull (Larus dominicanus) in flight showing upperwing, looking down at the water for food. Hauraki Gulf, Auckland, New Zealand, October.

Brent Stephenson / Immature Kelp gull (Larus dominicanus) second year bird in flight about to land on the water. At sea off Wanganui, New Zealand, August.

Brent Stephenson / Immature Kelp gull (Larus dominicanus) in flight against a blue sky. This is a second year bird, moulting into adult plumage. At sea off Wanganui, New Zealand, August.

Brent Stephenson / Nest of a Kelp gull (Larus dominicanus) containing two eggs. Westshore, Hawkes Bay, New Zealand, November.

Andy Trowbridge / Lesser black-backed gull (Larus fuscus) in flight over ice cover lake. Southern Norway. April.

Chris & Monique Fallows / Juvenile Cape kelp gull (Larus vetula) feeding on seal entrails, Seal Island, False Bay, South Africa, August.

Cheryl-Samantha Owen / Kelp gull (Larus dominicanus) juvenile, with head in rehabilitator's hand, Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), Cape Town, South Africa

Enrique Lopez-Tapia / Kelp Gull (Larus dominicanus) flying, Danco Island, Antarctica Peninsula. Antarctica.

Bert Willaert / Adult Kelp Gull (Larus dominicanus) in flight, Mocha Island, Chile, December

Andy Trowbridge / Southern Black-backed Gulls (Larus dominicanus) perched on rock, Kapiti Island, Wellington, North Island, New Zealand, August.

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

Ingo Arndt / Southern black backed / Kelp gull (Larus dominicanus) feeding on mussel, King Edward Point, South Georgia Island, February

Ingo Arndt / Southern black backed / Kelp gull (Larus dominicanus) on water surface, King Edward Point, South Georgia Island, February

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

Robert Thompson / Lesser black-backed gull (Larus fuscus) perched on rock, Saltee Island, County Wexford, Republic of Ireland, June

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.