- 26.8 in
- 58.7–71.7 in
- 44.1–95.2 oz
- Goéland bourgmestre (French)
- First- and second-year Glaucous Gulls appear to move farther southward than adults, and most individuals seen in the southern portion of the winter range are immatures.
- The Glaucous Gull is an active predator at seabird nesting colonies. It will walk into colonies and take eggs and chicks left unprotected, and will fly above a foraging arctic fox or person disturbing the colony and take eggs and chicks that are exposed during the disturbance.
- The oldest recorded Glaucous Gull was at least 9 years, 1 month old, when it was seen in Nunavut in 2003, and ID'd by its band.
Breeds along marine and freshwater coasts, tundra, offshore islands, cliffs, shorelines, ice edges. Rarely far inland. Winters along maritime coasts, freshwater lakes, agricultural fields, urban areas, and garbage dumps.
Marine invertebrates, fish, eggs and chicks of waterfowl and seabird species, small birds, small mammals, and vegetation. Scavenges fish, carrion, and human refuse.
- Clutch Size
- 1–3 eggs
- Egg Description
- Light gray-brown or olive with gray and dark brown spots.
- Condition at Hatching
- Alert and mobile, covered with dense, hairlike, gray-brown down.
Shallow depression in mound of grass, sedges, moss, twigs, and occasionally feathers. Little or no lining. Placed on islands, edges of ponds on open tundra, cliff ledges, grassy slopes above cliffs, rock scree at foot of cliffs.
Captures food near surface of water or on shore. Steals food from other gulls. Swallows large prey whole.
Glaucous Gull populations appear stable. The North American Waterbird Conservation Plan estimates 169,200 breeding birds on the continent, and rates the species a 7 out of 20 on the Continental Concern Score. Glaucous Gull is not listed on the 2014 State of the Birds Report.
- Gilchrist, H. G. 2001. Glaucous Gull (Larus hyperboreus). In The Birds of North America, No. 573 (A. Poole and F. Gill, eds.). The Birds of North America, Inc., Philadelphia, PA.
- Kushlan, J.A., et al. 2002. Waterbird conservation for the Americas: the North American Waterbird Conservation Plan, version 1. Waterbird Conservation for the Americas. Washington, DC.
- North American Bird Conservation Initiative, U.S. Committee. 2014. State of the Birds 2014 Report. U.S. Department of Interior, Washington, DC.
- USGS Patuxent Wildlife Research Center. 2015. Longevity records of North American Birds.