Larus cachinnans 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Charadriiformes Laridae

Scientific Name: Larus cachinnans Pallas, 1811
Regional Assessments:
Common Name(s):
English Caspian Gull
Taxonomic Source(s): AERC TAC. 2003. AERC TAC Checklist of bird taxa occurring in Western Palearctic region, 15th Draft. Available at: # _the_WP15.xls#.
Taxonomic Notes: L. michahellis and L. armenicus (del Hoyo and Collar 2014) were previously lumped as L. michahellis following a review by the BirdLife Taxonomic Working Group. Prior to that, L. armenicus had been split and L. cachinnans (del Hoyo and Collar 2014) had been lumped with L. michahellis as L. cachinnans following Sibley and Monroe (1990, 1993).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2017
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Facilitator/Compiler(s): Butchart, S., Calvert, R., Ekstrom, J., Malpas, L., Ashpole, J
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 increasing, 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 has not been quantified, but it is not believed to 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 can be found in eastern Europe, the Middle East, north-west Africa and central Asia. It is resident in much of the Black Sea and Caspian Sea. It also seasonally breeds from the Black Sea, across the north of the Caspian Sea to eastern Kazakhstan, and on the central Asian steppes. Wintering grounds include the coast of south-west Asia (breeders from the steppes), the north-west coast of Africa, and around the Arabian Peninsula up to north-west India.

Countries occurrence:
Afghanistan; Albania; Armenia; Azerbaijan; Bosnia and Herzegovina; Bulgaria; China; Djibouti; Egypt; Eritrea; Ethiopia; Georgia; India; Iran, Islamic Republic of; Iraq; Israel; Jordan; Kazakhstan; Kuwait; Lebanon; Oman; Pakistan; Palestinian Territory, Occupied; Qatar; Romania; Russian Federation (European Russia); Saudi Arabia; Somalia; Syrian Arab Republic; Turkey; Ukraine; United Arab Emirates; Uzbekistan; Yemen
Bahrain; Maldives; Nepal; Sri Lanka
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:5820000
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:Global population size is unknown owing to recent taxonomic splits. The European population is estimated at 54,100-87,500 pairs, which equates to 108,000-175,000 mature individuals (BirdLife International 2015).

Trend Justification:  The population is estimated to be increasing (BirdLife International 2015).

Current Population Trend:Increasing
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 This species is fully migratory, though some colonies aroundthe Black and Caspian Sea may be resident (del Hoyo et al. 1996). Post-breeding movements to wintering areas occur from July to November, with the return migration occurring from mid-February to mid-June (Olsen and Larsson 2003). The species breeds from mid-March to April (del Hoyo et al. 1996, Snow and Perrins 1998), although the exact timing varies geographically (Olsen and Larsson 2003). It breeds colonially in groups of up to 8,000 pairs, and may nest in monospecific clusters within mixed-species colonies (del Hoyo et al. 1996). Outside of the breeding season the species remains gregarious, congregating around ports, harbours and refuse dumps (le Grand et al. 1984). Habitat Breeding During the breeding season the species nests near lakes surrounded by reedbeds (Olsen and Larsson 2003) in steppe and semi-desert (Central Asia) (del Hoyo et al. 1996), reservoirs, rivers (de Juana 1984), and on grassy or shrubby river islands (del Hoyo et al. 1996), also forming colonies on sea cliffs (de Juana 1984), rocky and sandy offshore islands, rocky coasts (del Hoyo et al. 1996, Snow and Perrins 1998), sandy beaches, spits (del Hoyo et al. 1996), sand-dunes, and salt-pans (Snow and Perrins 1998), and foraging in intertidal zones (del Hoyo et al. 1996) and in brackish coastal marshes (Snow and Perrins 1998). Non-breeding Outside of the breeding season the species is more common along the coast (e.g. at harbours and ports) and in other marine habitats (though seldom far from land). During this season it also forages in cultivated fields (del Hoyo et al. 1996, Snow and Perrins 1998, Olsen and Larsson 2003) and along rivers, and is especially common at refuse dumps (del Hoyo et al. 1996, Snow and Perrins 1998). Diet Its diet consists of fish, invertebrates (including insects, molluscs (Olsen and Larsson 2003) and crabs (Munilla 1997)), reptiles, small mammals (e.g. voles (del Hoyo et al. 1996) and ground squirrels (Snow and Perrins 1998)), refuse, offal, and bird eggs and chicks (del Hoyo et al. 1996) (e.g. of petrels and shearwaters) (le Grand et al. 1984). Breeding site The nest is constructed of nearby vegetation, feathers, debris and old carcasses, and is preferably positioned close to or under bushes (del Hoyo et al. 1996), or on rocky and sandy islands, beaches, spits, sea cliffs, grassy or shrubby river islands (del Hoyo et al. 1996), and occasionally on high ground hundreds of metres from water (del Hoyo et al. 1996). The species breeds colonially in monospecific or mixed-species groups, with pairs usually nesting a few metres apart (del Hoyo et al. 1996).

Systems:Terrestrial; Freshwater; 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): This species is vulnerable to oil pollution (James 1984, del Hoyo et al. 1996). Utilisation The species is hunted for sport in Ukraine (Rudenko 2006). In the Black Sea area, many nests were destroyed and adults shot during the 1940s, to reduce their predation on the 'beneficial' L. melanocephalus. Culling is also considered to protect L. audouinii from expanding L. cachinnans populations and has taken place in parts of Spain. It is a frequent victim of oil pollution in some areas (James 1984, Burger and Gochfeld 1996). Within its European range some colonies are affected by egg harvesting/collection activities.

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. Within the EU it is listed on Annex II of the Birds Directive. There are 73 Important Bird Areas where this species occurs in Europe. In the EU there are 354 Special Protection Areas for this species.

Conservation Actions Proposed
The following information refers to the species's European range only: Management of key breeding and feeding sites to reduce human disturbance and habitat destruction.

Amended [top]

Amended reason: EOO updated.

Citation: BirdLife International. 2017. Larus cachinnans (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T22735929A118858781. . Downloaded on 28 May 2018.
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