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.

Steven Kazlowski / Two Ivory gulls (Pagophilia eburnea) in flight, one chasing the other away from a dead fin whale carcass along the coast of Svalbard, Norway

Staffan Widstrand / Two Ivory gulls camouflaged on ice {Pagophila eburnea / alba} Baffin Island, Canada

Staffan Widstrand / Ivory gull in flight {Pagophila eburnea / alba} Qaanaaq, Greenland.

Andy Rouse / Ivory Gull (Pagophila eburnea) On iceberg Svalbard

Tony Heald / Ivory gull (Pagophila eburnea) Svalbard, Norway, July.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) feeding on seal with Ivory gulls (Pagophila eburnea) standing by, Svalbard, Norway September

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) in flight, Svalbard, Norway September

Oriol Alamany / Ivory gull (Pagophila eburnea) resting on sea ice in the Arctic Ocean, Svalbard Islands, Norway, July

Oriol Alamany / Ivory gull (Pagophila eburnea) resting on sea ice in the Arctic Ocean, Svalbard Islands, Norway, July

Oriol Alamany / Ivory gull (Pagophila eburnea) rflying from sea ice in the Arctic Ocean, Svalbard Islands, Norway, July

Klein & Hubert / Ivory gull (Pagophila eburnea) sitting on ice, Svalbard

Klein & Hubert / Ivory gull (Pagophila eburnea) sitting on ice, Svalbard

Klein & Hubert / Ivory gull (Pagophila eburnea) taking off from ice, Svalbard

Klein & Hubert / Ivory gull (Pagophila eburnea) flying in front of blue glacier ice, Svalbard

Klein & Hubert / Polar bear (Ursus maritimus) large male with freshly caught Bearded seal (Erignathus barbatus) with three Glaucous gulls (Larus hyperboreus) and one Ivory gull (Pagophila eburnea) waiting to enjoy lef...

Staffan Widstrand / Two Ivory gulls (Pagophila eburnea) standing on snow, one of them is cleaning itself, Svalbard, Norway, Arctic, September

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) in flight, front view, Svalbard, Norway, July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) in flight in front of blue ice, Svalbard, Norway. July.

Ole Jorgen Liodden / Two Ivory gulls (Pagophila eburnea) on ice, Storfjorden, Svalbard, Norway, June.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) in flight, Storfjorden, Svalbard, Norway, June.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) drinking with reflection in water, Svalbard, Norway, July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) drinking with reflection in water, Svalbard, Norway, July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) in flight in front of blue ice, Spitsbergen, Svalbard, Norway. July.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) profile, Svalbard, Norway, August.

Ole Jorgen Liodden / Ivory gull (Pagophila eburnea) flying near blue ice, Spitsbergen, Svalbard, Norway, July.

Pal Hermansen / Polar bear (Ursus maritimus) with seal prey, with Glaucous gull (Larus hyperboreus) and Ivory gull (Pagophila eburnea), Franz Josef Land, arctic Russia.

Pal Hermansen / Ivory gull (Pagophila eburnea) and Arctic skua (Stercorarius parasitcus) over ice, Franz Josef land, Arctic Russia, July.

Roy Mangersnes / Ivory gull (Pagophila eburnea) in flight against a white sky, Svalbard, Norway, July.

Roy Mangersnes / Ivory gull (Pagophila eburnea) feeding in melting ocean ice, North of Svalbard, Norway, July.

Roy Mangersnes / Ivory gull (Pagophila eburnea) feeding in melting ocean ice, North of Svalbard, Norway, July.

Steven Kazlowski / Ivory gull (Pagophilia eburnea) adult in flight, Beaufort Sea, off the 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska

Danny Green / Ivory gull (Pagophila eburnea) adult resting on ice, Svalbard, August. Bookplate from Danny Green's 'The Long Journey North'

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) resting on ice. Spitsbergen, Svalbard, August.

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) resting on ice. Spitsbergen, Svalbard, August.

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) resting on ice. Spitsbergen, Svalbard, August.

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) resting on ice. Spitsbergen, Svalbard, August.

Ole Jorgen Liodden / Ivory Gull (Pagophila eburnea) in flight. Spitsbergen, Svalbard, August.

Brent Stephenson / Ivory Gulls (Pagophila eburnea) perched on an iceberg, one just about to take off. Van Keulenfjord, Svalbard, July.

Steven Kazlowski / Ivory gulls (Pagophilia eburnea) fighting over a nearby Fin whale carcass (Balaenoptera physalus) coastal Svalbard, Norway.

Steven Kazlowski / Ivory gull (Pageophilia eburnea) scavenging the carcass of a Fin whale (Balaenoptera physalus) floating along the coast of Svalbard, in summer, Norway

Steven Kazlowski / An adult Ivory gull (Pageophilia eburnea) flying over the coast of Svalbard in summer, Norway

Steven Kazlowski / An Ivory gull (Pagophila eburnea) chases another away from a dead Fin whale (Balaenoptera physalus) carcass along the coast of Svalbard, in summer, Norway

Bryan and Cherry Alexander / Ivory gull (Pagophila eburnea) in flight. Spitsbergen, Svalbard, Norway, June.

Steven Kazlowski / Ivory gull (Pageophilia eburnea) scavenging on the carcass of a Fin whale (Balaenoptera physalus) Svalbard, Norway, August 2009

Steven Kazlowski / Two Ivory gulls (Pagophilia eburnea) in flight, one chasing the other away from a dead fin whale carcass along the coast of Svalbard, Norway

Gerrit Vyn / Adult Ivory Gull (Pagophila eburnea). This arctic dependent species appears to be declining rapidly due to climate change. Resolute, Nunavut, Canada. June.