Jay Garrulus glandarius   [Linnaeus, 1758]

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Order: Passeriformes Family: Corvidae
BTO Codes: J., JAY.. EURING No: 15390
Number in Britain: 170 thousand Territories (Summer)
Conservation Status:
UK: GREEN
European: Not a species of concern
Global: (Details)
Status in UK: (A)  Resident Breeder, Winter Visitor
Subspecies: rufitergum (R), glandarius (S), hibernicus recorded in Britain (of 35 subsp. in the world)
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Length: 34 cm Wingspan: 55 cm Weight: M/F: 170 g    
Scientific name from: L.: garrulus=chattering and L.: glandarius=producing acorns (from glandis=acorn)
World Distribution: Europe, Asia, nw Africa
Habitat: Forest, woodland, towns
Diet: Invertebrates (esp beetles, caterpillars) fruit and seeds (esp acorns which are cached)
Identification Tips:
  Images from IBC or search flickr
  Videos from IBC
  Sound from xeno-canto
Crossley ID photos

Population and Distribution

Population Trend: BirdTrends   
Regional Trends: Wales   England   English Regions
Distribution: Atlas Mapstore    BBS Maps
British Population Size:
    Summer: 170 thousand Territories in 2009
    First Record: Recorded in Medieval times [Fossil evidence from Middle Pleistocene, c. 500,000 yr ago]
    Latest Survey: Musgrove, A. et al. (2013) British Birds 106:64-100
    Conservation Status: GREEN
   Previous Assessments: 2002-2007 GREEN     1996-2001 GREEN  
   Races of Concern: rufitergum AMBER (Important Population), glandarius GREEN
Habitat Occupancy (in the Breeding Season):
    Most frequent in: Deciduous Wood
    And found in: Scrub, Coniferous Wood
Relative Frequency in Each Habitat:
European Population Size:
    Summer: 4.8 to 10.5 million pairs   (Trend in Numbers)
Population Assesment from Birds in Europe
Distribution in Europe mapped by the EBCC Atlas
Listed on the Appendices/Schedules of: WCA(III), WBD(II*)
Survey Results: Results from BirdTrack
Results from Garden BirdWatch

Breeding and Survival

Egg Size: 31 x 23 mm Egg Weight: 8.5 g (of which 6 % is shell)
Number of Nest Records: 26   (more would be welcome!)
Clutch Size: 4 - 5 eggs 4.59 ▒ 0.95 (2 - 7) N = 240
Incubation: 18- 18 days 17.74 ▒ 1.03 (16 - 19.5) N = 240   by the: Male + Female
Fledging: 20 - 23days 21.58 ▒ 2.23 (18 - 25) N = 333 as: Altricial, naked
Source:
British Trust for Ornithology (2005) Nest Record Scheme data
First Clutches Laid: 31 Mar (1 Mar - 30 Apr)
Number of Broods: 1
See trends in Breeding Productivity
Number Ringed: Annual Totals
Adult Survival: 0.590       
Juvenile Survival: 0.600 (in First-Year)  
Age at First Breeding: 2 years Typical Lifespan: 4 years
Maximum Recorded Age: 16 years 9 months 19 days (set in 1983)
Read a summary of Ringing Recoveries

Biometrics

Ring Size: D (pulli E)
Wing Length Adult: 181.1 ▒ 6.2 Range 171 - 191 mm, N =1404
Juvenile: 178.0 ▒ 5.6 170 - 188 mm, N =515
Male: 184.8 ▒ 6.8 174 - 196 mm, N =152
Female: 179.8 ▒ 5.9 171 - 190 mm, N =285
Weight Adult: 166.8 ▒ 13.99 Range 144.0 - 189.0 g , N =1113
Juvenile: 162.8 ▒ 15.65 139.0 - 184.0 g , N =417
Male: 172.0 ▒ 14.33 146.0 - 197.0 g , N =116
Female: 164.0 ▒ 14.23 143.4 - 187.0 g , N =234
Source:
British Trust for Ornithology (2005) Ringing Scheme data

Other Names

Eurasian Jay
Gaelic: Sgreuchag-choille Welsh: Ysgrech y Coed
Danish: Skovskade Dutch: Vlaamse gaai
Finnish: Nńrhi French: Geai des chŕnes
German: Eichelhńher Hungarian: Szajkˇ
Icelandic: SkrŠkska­i Irish: ScrÚachˇg
Italian: Ghiandaia Norwegian: N°tteskrike
Polish: Sˇjka zwyczajna Portuguese: Gaio-comum
Spanish: Arrendajo com˙n Swedish: N÷tskrika
Local Names: Acorn Jay
Collective Noun:Party

For More Information...

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