Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) behind Polar bear (Ursus maritimus) framed by its legs, Svalbard, Norway, July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) behind Polar bear (Ursus maritimus), Svalbard, Norway, July.

Chris Gomersall / 2020VISION / Northern gannet (Sula bassana) being mobbed by immature Great black-backed gull (Larus marinus), Shetland Islands, Scotland, UK, October

Nick Upton / Aerial view of a dense flock of Great Cormorants (Phalacrocorax carbo) resting on a sandbank at Scroby Sands along with a mixed species flock of gulls including Greater black-backed gulls (Larus marin...

Graham Eaton / Great Black-backed Gulls (Larus marinus) flying over the sea in a storm, near St Tudwals Islands, Cardigan Bay, Wales, May 2009.

Guy Edwardes / Great black-backed gull (Larus marinus) portrait, with deformity (tongue punctured throat but bird remains healthy and feeding chicks) Great Saltee, Co. Wexford, Republic of Ireland, June

Wild Wonders of Europe / Widstrand / White tailed sea eagle (Haliaeetus albicilla) and Greater black backed gull (Larus marinus) in flight, Flatanger, Norway, August 2008

Wild Wonders of Europe / Hermansen / Greater black backed gull (Larus marinus) chick near a hatching egg, Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermansen / Two Greater black backed gull (Larus marinus) chicks, Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermansen / Greater black backed gull (Larus marinus) egg hatching near a chick, Saltee Islands, County Wexford, Republic of Ireland, June 2009

Wild Wonders of Europe / Hermans / Greater black backed gull (Larus marinus) egg hatching, Saltee Islands, County Wexford, Republic of Ireland, June 2009. WWE INDOOR EXHIBITION Wild Wonders kids book.

Wild Wonders of Europe / Widstrand / Two Greater black backed gulls (Larus marinus) fighting, Flatanger, Norway, June 2008