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Garrulus glandarius 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Passeriformes Corvidae

Scientific Name: Garrulus glandarius (Linnaeus, 1758)
Regional Assessments:
Common Name(s):
English Eurasian Jay
Taxonomic Source(s): del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

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): Ashpole, J, Butchart, S., Ekstrom, J., Derhé, M., Wheatley, H.
Justification:
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 extremely 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:Garrulus glandarius is distributed widely across Europe and into Morocco and Algeria, its' range continues east into the Urals and northern Middle East, through 
Azerbaijan and Mongolia into China, Korea and Japan.
Countries occurrence:
Native:
Albania; Algeria; Andorra; Armenia; Austria; Azerbaijan; Belarus; Belgium; Bhutan; Bosnia and Herzegovina; Bulgaria; China; Croatia; Cyprus; Czech Republic; Denmark; Estonia; Finland; France; Georgia; Germany; Greece; Hong Kong; Hungary; Iran, Islamic Republic of; Iraq; Ireland; Israel; Italy; Japan; Jordan; Kazakhstan; Korea, Democratic People's Republic of; Korea, Republic of; Latvia; Lebanon; Liechtenstein; Lithuania; Luxembourg; Macedonia, the former Yugoslav Republic of; Moldova; Mongolia; Montenegro; Morocco; Netherlands; Norway; Palestinian Territory, Occupied; Poland; Portugal; Romania; Russian Federation (Central Asian Russia, Eastern Asian Russia, European Russia); Serbia; Slovakia; Slovenia; Spain; Sweden; Switzerland; Syrian Arab Republic; Taiwan, Province of China; Thailand; Tunisia; Turkey; Ukraine; United Kingdom
Vagrant:
Gibraltar; Malta
Additional data:
Continuing decline in area of occupancy (AOO):Unknown
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:43100000
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:In Europe, the breeding population is estimated to number 7,480,000-14,600,000 pairs, which equates to 15,000,000-29,300,000 mature individuals (BirdLife International 2015). Europe forms 45% of the global range, so a very preliminary estimate of the global population size is 33,000,000-65,100,000 mature individuals, although further validation of this estimate is needed.

Trend Justification:  In Europe, trends between 1980 and 2013 show that populations have undergone a moderate increase (EBCC 2015). The overall population trend is suspected to be stable in the absence of evidence for any declines or substantial threats.
Current Population Trend:Stable
Additional data:
Number of mature individuals:30000000-65999999Continuing 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:This species inhabits woodlands and forests of all kinds, especially beech (Fagus) and hornbeam (Carpinus), although oak (Quercus) is preferred. It can also be found in parks, orchards and large gardens. Northern populations also occur in conifers and birch (Betula) forest. In most of Europe, egg-laying occurs mainly from mid-April. The nest is built by both sexes and is a well-constructed, platform of twigs around a relatively deep cup, lined with soft plant materials. It is usually placed four to six metres above ground and often at the junction of substantial branch and main trunk. Clutches are typically five to seven eggs. It is omnivorous, feeding mostly on invertebrates during the breeding season. It also takes eggs and nestlings of a range of birds up to the size of a sparrowhawk (Accipiter) and a wide variety of seeds and berries, especially in autumn and winter, including grain, beech mast, chestnuts and acorns. Throughout the autumn and into winter it builds up caches of acorns, burying them individually in leaf litter on forest floor or beneath clumps of brambles or ferns, and has been estimated that a single bird could store c. 3000 acorns in one month (Madge 2009). The species is mainly resident with irregular movements, including irruptions and seasonal altitudinal movements (Madge 2009).
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Unknown
Generation Length (years):7.5
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): The species's colourful blue wing feathers became very fashionable in the early 20th century, both as hat decoration and in the making of "flies" for salmon-fishing. It was also long persecuted by gamekeepers and farmers due to its habit of raiding nests, although persecution is now much less widespread (Madge 2009).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
EU Birds Directive Appendix II. There are currently no known specific conservation measures for this species within Europe.

Conservation Actions Proposed
No conservation measures are currently needed for this species within Europe.

Amended [top]

Amended reason: Map edited: Shaded S Japan and S Korea (see G. bispecularis). EOO updated.

Citation: BirdLife International. 2017. Garrulus glandarius (amended version of 2016 assessment). The IUCN Red List of Threatened Species 2017: e.T103723684A118779004. . Downloaded on 16 August 2018.
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