Larus hyperboreus 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Charadriiformes Laridae

Scientific Name: Larus hyperboreus Gunnerus, 1767
Regional Assessments:
Common Name(s):
English Glaucous Gull
Taxonomic Source(s): Cramp, S. and Simmons, K.E.L. (eds). 1977-1994. Handbook of the birds of Europe, the Middle East and Africa. The birds of the western Palearctic. Oxford University Press, Oxford.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Ashpole, J, Butchart, S., Calvert, R., Ekstrom, J., Malpas, L.
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species breeds in the Arctic regions of the northern hemisphere. Birds breeding in northern Europe and Asia tend to remain near the colony year-round. Breeders in North America migrate south, being found in the North Pacific from California (U.S.A.) round to the extreme south-east of Russia, off the western coast of North America down to Virginia, and the Atlantic coast of Europe down to Brittany, France including the United Kingdom and Ireland (del Hoyo et al. 1996).

Countries occurrence:
Belgium; Canada; China; Denmark; Estonia; Faroe Islands; Finland; France; Germany; Greenland; Iceland; Ireland; Japan; Korea, Democratic People's Republic of; Korea, Republic of; Latvia; Lithuania; Mexico; Netherlands; Norway; Poland; Romania; Russian Federation (Central Asian Russia, Eastern Asian Russia, European Russia); Saint Pierre and Miquelon; Slovakia; Spain; Svalbard and Jan Mayen; Sweden; United Kingdom; United States
Austria; Bermuda; Bulgaria; Czech Republic; Hong Kong; Hungary; Israel; Italy; Jordan; Kazakhstan; Malta; Mongolia; Montenegro; Morocco; Portugal; Serbia; Slovenia; Switzerland; Tunisia; Ukraine
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:25600000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:No
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The global population is estimated to number c.400,000-1,500,000 individuals (Wetlands International 2015). The European population is estimated at 46,500-135,000 pairs, which equates to 93,000-270,000 mature individuals (BirdLife International 2015). National population sizes have been estimated at > c.1,000 wintering individuals in Japan and c.10,000-1 million breeding pairs and > c.1,000 individuals on migration in Russia (Brazil 2009).

Trend Justification:  The overall population trend is stable (Wetlands International 2015). This species has undergone a small or statistically insignificant increase over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007). Note, however, that these surveys cover less than 50% of the species's range in North America. The European population trend is estimated to be stable (BirdLife International 2015).
Current Population Trend:Stable
Additional data:
Continuing decline of mature individuals:Unknown
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:Unknown
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:Behaviour Most populations of this species migrate southwards after breeding although some western Palearctic breeders remain on their breeding grounds throughout the year (del Hoyo et al. 1996). The species breeds from mid-May to mid-June (the timing depending on latitude and ice conditions) in solitary pairs or small colonies (del Hoyo et al. 1996), departing the breeding grounds from September to mid-October (Olsen and Larsson 2003). Outside of the breeding season the species is gregarious and occurs in small or large flocks, up to tens of thousands gathering where food is temporarily abundant (Snow and Perrins 1998) during the winter (e.g. at fishing harbours) (Olsen and Larsson 2003). Habitat It breeds on sea cliffs and inshore islands (del Hoyo et al. 1996, Snow and Perrins 1998), particularly near human settlements and often near colonies of other gulls or geese (del Hoyo et al. 1996). The species may also breed on islands in lakes near the coast (del Hoyo et al. 1996, Snow and Perrins 1998) or on the edges of coastal lagoons (Snow and Perrins 1998). Throughout the year the species forages over coasts, bays, harbours, inshore waters with sewage outfalls, the intertidal zone, land-fill sites, fishing wharves and large inland lakes (del Hoyo et al. 1996). Diet Its diet consists of fish, molluscs, Echinoderms, crustaceans, rodents, adult and young birds, eggs (especially of ducks, auks and shorebirds), insects, berries and carrion (del Hoyo et al. 1996). Breeding site The nest is a mound of seaweed and debris (del Hoyo et al. 1996) usually placed on the edges of cliffs, rock pinnacles (del Hoyo et al. 1996), rocky outcrops (Snow and Perrins 1998), slopes (del Hoyo et al. 1996) and occasionally on ice or snow (Snow and Perrins 1998).
Systems:Terrestrial; Marine
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):12.4
Movement patterns:Full Migrant
Congregatory:Congregatory (and dispersive)

Threats [top]

Major Threat(s): The species is threatened by organohalogen pollution in its Arctic breeding range (Bustnes et al. 2004, Verreault et al. 2007) (there is evidence that organohalogen contaminants alter the species's basal metabolic rate (Verreault et al. 2007) and that organochlorines reduce the efficiency of its immune system (Bustnes et al. 2004)). In parts of its breeding range the species is also being displaced by Herring Gull Larus argentatus (del Hoyo et al. 1996). Utilisation First year birds are hunted in Greenland, mainly between August and November (Evans 1984).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
The following information refers to the species's European range only: The species is covered under the African Eurasian Waterbird Agreement. There are 16 Important Bird Areas which include this species in Europe. Within the EU there are three Special Protection Areas which include this species. 

Conservation Actions Proposed
The following information refers to the species's European range only: Monitoring of contaminant build-up within individuals; Identification of important sites (breeding and at sea) and designation as protected areas.

Citation: BirdLife International. 2016. Larus hyperboreus. The IUCN Red List of Threatened Species 2016: e.T22694343A86730550. . Downloaded on 22 May 2018.
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