Tony Heald / Glaucous Gull (Larus hyperboreus) taking off from ice, Svalbard Norway, July.
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Alan Murphy / Glaucous Gull (Larus hyperboreus) striking at a fish while in flight, British Columbia, Canada
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Roy Mangersnes / Glaucious gull (Larus hyperboreus) flying against a blue glacier front, Spitsbergen, Svalbard, Norway, September
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Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) on blue ice. Spitsbergen, Svalbard, July.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) with blooded face looking at Glaucous Gull (Larus hyperboreus) in flight. Spitsbergen, Svalbard, July.
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Wild Wonders of Europe / de la Lez / Glaucous gull (Larus hyperboreus) in flight, Moselbukta, Svalbard, Norway, July 2008
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Wild Wonders of Europe / de la Lez / Glaucous gull (Larus hyperboreus) in flight, Moselbukta, Svalbard, Norway, July 2008
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Wild Wonders of Europe / Liodden / Two Glaucous gulls (Larus hyperboreus) flying past a glacier, Spitsbergen, Svalbard, March 2009
Ben Cranke / Glaucous gull (Larus hyperboreus) roosting on iceberg, Svalbard, Norway. July.
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Ben Cranke / Glaucous gull (Larus hyperboreus) Svalbard, Norway. July.
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Markus Varesvuo / Glaucous gull (Larus hyperboreus) flying in snow fall, Norway, Europe, April.
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Markus Varesvuo / Glaucous Gull (Larus hyperboreus) flying over water, Norway, April
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Markus Varesvuo / Glaucous Gull (Larus hyperboreus) in flight, Norway, April
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Bryan and Cherry Alexander / Glaucous gulls (Larus hyperboreus) squabbling whilst waiting for a Polar bear (Ursus maritimus) to leave its kill so they can scavenge, Svalbard, Norway.
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Pal Hermansen / Polar bear (Ursus maritimus) with seal prey, with Glaucous gull (Larus hyperboreus) and Ivory gull (Pagophila eburnea), Franz Josef Land, arctic Russia.
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Sergey Gorshkov / Polar bear (Ursus maritimus) group on beach, one with carcass, also Glaucous gulls (Larus hyperboreus) Wrangel Island, Far Eastern Russia, September.
Markus Varesvuo / Glaucous gull (Larus hyperboreus) subadult in flight, Norway, April
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Markus Varesvuo / Glaucous gull (Larus hyperboreus) profile, Norway, April
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Markus Varesvuo / Glaucous gull (Larus hyperboreus) in flight over water, Iceland, June
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Markus Varesvuo / Glaucous gull (Larus hyperboreus) portrait, Norway, April
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Roy Mangersnes / Polar bear (Ursus maritimus) playing with an injured Glaucous gull (Larus hyperboreus) Spitsbergen, Svalbard, Norway, August
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Roy Mangersnes / Four Glaucous gulls (Larus hyperboreus) Spitsbergen, Svalbard, Norway, August
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Roy Mangersnes / Polar bear (Ursus maritimus) playing with an injured Glaucous gull (Larus hyperboreus) Spitsbergen, Svalbard, Norway, August
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Roy Mangersnes / Polar bear (Ursus maritimus) playing with an injured Glaucous gull (Larus hyperboreus) Spitsbergen, Svalbard, Norway, August
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Robin Chittenden / Glaucous gull (Larus hyperboreus) in flight, Sheringham, Norfolk, UK, February
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Robin Chittenden / Glaucous gulls (Larus hyperboreus) Sheringham Norfolk, UK, February
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) at seal kill, with two Glaucous Gulls (Larus hyperboreus) fighting over scraps. Nordaustlandet, Svalbard, September.
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Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) taking flight from ice. Spitsbergen, Svalbard, July.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) at seal kill, with Glaucous gull (Larus hyperboreus) in foreground. Nordaustlandet, Svalbard, September.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) attacking Glaucous Gull (Larus hyperboreus) on water. Spitsbergen, Svalbard, August.
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Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) resting on ice. Spitsbergen, Svalbard, July.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) attacking Glaucous Gull (Larus hyperboreus) on water. Spitsbergen, Svalbard, August.
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Ole Jorgen Liodden / Polar Bear (Ursus maritimus) attacking and catching Glaucous Gull (Larus hyperboreus) on water. Spitsbergen, Svalbard, August.
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Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) trying to swallow a guillemot (Uria aalge) chick. Spitsbergen, Svalbard, August.
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Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) in flight, backlit. Spitsbergen, Svalbard, July.
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Ole Jorgen Liodden / Glaucous Gull (Larus hyperboreus) on blue ice. Spitsbergen, Svalbard, August.
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Ole Jorgen Liodden / Two Polar Bears (Ursus maritimus) attacking Glaucous Gull (Larus hyperboreus) on water. Spitsbergen, Svalbard, August.
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Markus Varesvuo / Glaucous Gull (Larus hyperboreus) in flight in front of a nearly full moon. Norway, April.
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Brent Stephenson / Juvenile Glaucous Gull (Larus hyperboreus) standing on the shoreline. Sermet Glacier, Prince Christian Sound, Southern Greenland, August.
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Markus Varesvuo / Glaucous Gull (Larus hyperboreus) adult in winter plumage, Norway, March
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Roger Powell / Immature Glaucous Gull (Pluvialis apricaria) fighting an immature Greater Black-backed Gull (Larus marinus), Varanger Fjord, Arctic Norway. June
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Roger Powell / Immature Glaucous Gull (Larus hyperboreus) fighting an immature Great Black-backed Gull (Larus marinus) Varanger Fjord, Arctic Norway. June
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Roger Powell / Immature Glaucous Gull (Larus hyperboreus) standing on shoreline, Varanger Fjord, Arctic Norway. June
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Suzi Eszterhas / Glaucous-winged Gull eggs (Larus glaucescens) nest amongst driftwood debris, Katmai National Park, Alaska, USA, June 2008
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Suzi Eszterhas / Glaucous-winged Gull (Larus glaucescens) chick sheltering against log, Katmai National Park, Alaska, USA, June
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Kevin Schafer / Glaucous Gull (Larus hyperboreus) group in front of Monaco Glacier, Leifdefjorden, Svalbard, Norway
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Hanne & Jens Eriksen / Glaucous gull {Larus hyperboreus} two sitting in grass, Iceland, June
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Hanne & Jens Eriksen / Glaucous gull {Larus hyperboreus} flock on stony beach, Iceland, June
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Hanne & Jens Eriksen / Glaucous gull {Larus hyperboreus} standing on a bed of kelp surrounded by water, Iceland, June
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Hanne & Jens Eriksen / Glaucous gull {Larus hyperboreus} in flight, Iceland, June
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Wild Wonders of Europe / de la Lez / Glaucous gull (Larus hyperboreus) in flight, Moselbukta, Svalbard, Norway, July 2008