Roger Powell / Greater black-backed gull {Larus marinus} in flight attack, Honoya island, varanger, Norway

Graham Eaton / Great Black-backed Gull (Larus marinus) taking off from the sea with a fish in its beak, Cardigan Bay, Wales, UK, May

Graham Eaton / Great Black-backed Gull (Larus marinus) taking off from the sea, Cardigan Bay, Wales, UK, June

Graham Eaton / Great Black-backed Gull (Larus marinus) on the sea, Cardigan Bay, Wales, June

Andy Sands / Greater Black-backed Gull (Larus marinus) In flight over sea, Oban, Scotland, UK

Duncan Usher / Great Black-backed Gull (Larus marinus) pair displaying on fence, Texel, Netherlands

Duncan Usher / Great Black-backed Gull (Larus marinus) calling while flying, Texel, Netherlands

Duncan Usher / Great Black-backed Gull (Larus marinus) calling while flying, Texel, Netherlands

Jouan Rius / Greater black backed gull (Larus marinus) portrait, Shetland Islands, Scotland, UK

Scott Leslie / Great Black-backed Gull (Larus marinus) and Herring Gull (Larus argentatus) flock flying, Sheffield Mills, Annapolis Valley, Nova Scotia, Canada

Scott Leslie / Great Black-backed Gull (Larus marinus) and Herring Gull (Larus argentatus) flock flying, Sheffield Mills, Annapolis Valley, Nova Scotia, Canada

Scott Leslie / Great Black-backed Gull (Larus marinus) and Herring Gull (Larus argentatus) flock flying, Sheffield Mills, Annapolis Valley, Nova Scotia, Canada

Scott Leslie / Great Black-backed Gull (Larus marinus) and Herring Gull (Larus argentatus) flock flying, Sheffield Mills, Annapolis Valley, Nova Scotia, Canada

John Cancalosi / Greater Black-backed Gull (Larus marinus) New York, USA

John Cancalosi / Greater Black-backed Gull (Larus marinus) first winter juvenile feeding on Pumpkin seed sunfish, Note: band on leg, New York, USA

David Kjaer / Great Black-backed Gull (Larus marinus) juvenile on water, Poland

Chris Gomersall / Greater black-backed gull (Larus marinus) adult in flight. Inner Hebrides, Scotland. June.

Konrad Wothe / Grey Heron (Ardea cinerea) and young Great Black-backed Gull (Larus marinus), Usedom, Germany

Konrad Wothe / Great Black-backed Gull (Larus marinus) flying with captured fish, Baltic Sea, Germany

Pete Cairns / Greater black-backed gull (Larus marinus) calling while flying, Norway

Seppo Valjakka / Greater black backed gull {Larus marinus} catching fish, Finland.

DAVID TIPLING / Greater black backed gull {Larus marinus} portrait

Staffan Widstrand / Greater black-backed gull {Larus marinus} in flight, Norway.

Staffan Widstrand / Greater black-backed gull {Larus marinus} fishing, Norway.

Staffan Widstrand / Greater black-backed gull {Larus marinus} fishing, Norway.

Staffan Widstrand / Greater black-backed gull {Larus marinus} fishing, Norway.

Staffan Widstrand / Greater black-backed gull {Larus marinus} flying, Norway.

Staffan Widstrand / Greater black-backed gull {Larus marinus} flying, Norway.

David Kjaer / Two Greater black backed gulls {Larus marinus} Scotland

Jan Vermeer / Great Black-backed Gull (Larus marinus) close up of adult flying, Europe

Louis Gagnon / Greater black backed gull chicks, St. Mary's Islands, Canada.

Dietmar Nill / Greater black backed gull (Larus marinus) in flight. Sweden, Scandinavia, Europe

Barry Bland / Greater black backed gull (Larus marinus) standing on a beach.

Scott Leslie / Great Black-backed Gull (Larus marinus) and Herring Gull (Larus argentatus) flock flying, Nova Scotia, Canada

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

Peter Lewis / Great black backed gull (Larus marinus) on water, Norway.

DAVID TIPLING / Great skua {Catharacta skua} stealing fish from Greater black backed gull. Scotland UK