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

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

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

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.