Tony Heald / Glaucous Gull (Larus hyperboreus) taking off from ice, Svalbard Norway, July.

Klein & Hubert / Glaucous gull (Larus hyperboreus) standing on edge of ice calling, Svalbard, Norway

Roy Mangersnes / Glaucious gull (Larus hyperboreus) flying against a blue glacier front, Spitsbergen, Svalbard, Norway, September

Ole Jorgen Liodden / Polar Bear (Ursus maritimus) with blooded face looking at Glaucous Gull (Larus hyperboreus) in flight. Spitsbergen, Svalbard, July.

Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) on blue ice. Spitsbergen, Svalbard, July.

Wild Wonders of Europe / de la Lez / Glaucous gull (Larus hyperboreus) in flight, Moselbukta, Svalbard, Norway, July 2008

Wild Wonders of Europe / Liodden / Two Glaucous gulls (Larus hyperboreus) flying past a glacier, Spitsbergen, Svalbard, March 2009

Wild Wonders of Europe / de la Lez / Glaucous gull (Larus hyperboreus) in flight, Moselbukta, Svalbard, Norway, July 2008

Hanne & Jens Eriksen / Glaucous gull {Larus hyperboreus} adult, Monaco Glacier, Svalbard, Norway

Alan Murphy / Glaucous Gull (Larus hyperboreus) striking at a fish while in flight, British Columbia, Canada

Guy Edwardes / Glaucous Gull (Larus hyperboreus) in flight, Hokkaido, Japan. February

Ole Jorgen Liodden / Glaucous gull (Larus hyberboreus) seen through blue ice cave. Svalbard, Norway, August.

Pal Hermansen / Glaucous gull (Larus hyperboreus) and Kittiwake (Rissa tridactyla) flocks flying over ice brim of Brasvellbreen, Austfonna glacier, in morning light. Nordaustlandet, Svalbard, Norway. September 2011.

Jenny E. Ross / Seabird colony on off-shore rocks in the Bering Sea near Verkhoturova Island, Russia. The nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as...

Jenny E. Ross / Ecotourists view a seabird colony on off-shore rocks in the Bering Sea near Verkhoturova Island, Russia. The nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia ar...

Jenny E. Ross / Seabird colony on off-shore rocks in the Bering Sea near Verkhoturova Island, Russia. The nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as...

Jenny E. Ross / Seabird colony on Verkhoturova Island in the Bering Sea, Russia. Nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as the common murre and thi...

Jenny E. Ross / Seabird colony on Verkhoturova Island in the Bering Sea, Russia. Nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as the common murre and thi...

Jenny E. Ross / Seabird colony on Verkhoturova Island in the Bering Sea, Russia. Nesting species include common and Brunnich's guillemots (Uria aalge and Uria lomvia arra -- also known as the common murre and thi...

Jenny E. Ross / Glaucous gull (Larus hyperboreus) chicks at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Glaucous gull (Larus hyperboreus) chicks at a huge cliffside seabird colony on Kolyuchin Island, Chukotka, Siberia, Russia.

Jenny E. Ross / Glaucous gull (Larus hyperboreus), Kolyuchin Island, Chukchi Sea, Russia

Jenny E. Ross / Glaucous gull (Larus hyperboreus), Kolyuchin Island, Chukchi Sea, Russia

Jenny E. Ross / Glaucous gull (Larus hyperboreus), Kolyuchin Island, Chukchi Sea, Russia

Jenny E. Ross / Glaucous gull (Larus hyperboreus), Kolyuchin Island, Chukchi Sea, Russia

Jenny E. Ross / Glaucous gull (Larus hyperboreus), Kolyuchin Island, Chukchi Sea, Russia

Robin Chittenden / Glaucous gull (Larus hyperboreus) Norfolk, England, UK, February.

Robin Chittenden / Glaucous gull (Larus hyperboreus) Norfolk, England, UK. February.

SCOTLAND: The Big Picture / Glaucous gull, (Larus hyperboreus), 2nd winter, chasing hooded crow from carcass, Scotland, UK.February

David Tipling / Glaucous gull (Larus hyperboreus) adult winter Sheringham Norfolk, England, UK. January

David Tipling / Glaucous gull (Larus hyperboreus) 1st winter plumage Sheringham Norfolk, England, UK. January

Jeff Vanuga / Common eider duck (Somateria mollissima) female defending nest against Glaucous gull (Larus hyperboreus) in Spitsbergen, Svalbard, Norway. June.

Klein & Hubert / Glaucus gull (Larus hyperboreus) feeding on Brunnich's guillemot (Uria lomvia) chick. Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) with Brunnich's guillemot (Uria lomvia) chick prey in his beak. Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) with Brunnich's guillemot (Uria lomvia) chick prey in his beak. Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) taking off, Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) feeding on Brunnich's guillemot (Uria lomvia) chick. Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) feeding on Brunnich's guillemot (Uria lomvia) chick. Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) feeding on Brunnich's guillemot (Uria lomvia) chick. Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) in flight, Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) resting on iceberg, Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) resting on iceberg, Svalbard, Norway.

Klein & Hubert / Glaucus gull (Larus hyperboreus) in flight over iceberg, Svalbard, Norway.

Pal Hermansen / Glaucous gull (Larus hyperboreus) eating on Brunnich's guillemot (Uria lomvia) chick, Alkrefjellet bird cliff Hinlopen, Svalbard, Norway, July.

Pal Hermansen / Glaucous gull (Larus hyperboreus) in front of ship, Svalbard, Norway, July.

Pal Hermansen / Glaucous gull (Larus hyperboreus) eating dead Brunnich's guillemot (Uria lomvia) Alkefjellet, Hinlopenstrait, Svalbard, Norway, July.

Pal Hermansen / Glaucous gull (Larus hyperboreus) eating dead Kittiwake (Rissa tridactyla) Alkefjellet, Svalbard, Norway, July 2016.

Markus Varesvuo / Glaucous gull (Larus hyperboreus) in flight over sea, Vardo, Norway March