Jussi Murtosaari / Sabine's gull (Larus sabini), adult in flight, Finland, September

Jussi Murtosaari / Sabine's gull Larus sabini), adult in flight, Finland, September

Ole Jorgen Liodden / Sabine's gull (Xema sabini) Svalbard, Norway, June.

Jonas Landolt / Sabine's Gull (Xema sabini) flying, Zurich, Switzerland

Roy Mangersnes / Sabine's gull (Xema sabini) at lake edge, Lagoya, Svalbard, Norway, July.

Bob Steele / Sabine's Gull (Xema sabini), Inyo County, California

Bob Steele / Sabine's Gull (Xema sabini) juvenile, Inyo County, California

Brent Stephenson / Sabine's gull (Larus / Xema sabini) adult in nearly full breeding plumage, off Madeira, North Atlantic. May.

Gerrit Vyn / Sabine gull (Larus / Xema sabini) Teshekpuk Lake Special Area, Alaska, USA July

Ole Jorgen Liodden / Sabine's Gull (Xema sabini) foraging in water. Nordaustlandet, Svalbard, July.

Eric Baccega / Sabine's Gull (Xema sabini) in flight showing underwing. Foxe Basin, Nunavut, Canada, April.

Roy Mangersnes / Sabine's Gull (Xema sabini) sitting in a pond, stretching, on arctic tundra of Barrow, Alaska, USA. June

Roy Mangersnes / Sabine's Gull (Xema sabini) sitting in a pond on the arctic tundra of Barrow, Alaska, USA. June

Roy Mangersnes / Sabine's Gull (Xema sabini) sitting in a pond on the arctic tundra of Barrow, Alaska, USA. June

Roy Mangersnes / Sabine's Gull (Xema sabini) flying in midnight sun on the arctic tundra of Barrow, Alaska, USA. June

Glenn Bartley/ BIA / Sabine's Gull (Xema sabini), Alaska

Glenn Bartley/ BIA / Sabine's Gull (Xema sabini), Alaska