Population and Distribution
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Population Trend:
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 Wider Countryside Report
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Regional Trends:
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Wales
England
English Regions
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Distribution:
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Atlas Maps
(Local Atlases)
BBS Maps
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British Population Size:
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Summer:
160 thousand territories
in 2000
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First Record:
14th Century
[Fossil evidence from
Middle Pleistocene, c. 500,000 yr ago]
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Latest Survey:
Gregory, R.D. & Marchant, J.H. (1996) Bird Study 43:28-37
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Conservation Status:
GREEN
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Previous Assessments:
2002-2007
GREEN
1996-2001
GREEN
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Races of Concern:
rufitergum AMBER (Important Population), glandarius GREEN
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Habitat Occupancy (in the Breeding Season):
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Most frequent in:
Deciduous Wood
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And found in:
Scrub, Coniferous Wood
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Relative Frequency in Each Habitat:
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European Population Size:
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Summer:
4.8 to 10.5 million pairs
(Trend in Numbers)
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Population Assesment from Birds in Europe
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Distribution in Europe
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Listed on the Appendices/Schedules of:
WCA(III), WBD(II*)
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Survey Results:
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BirdTrack
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Garden BirdWatch
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Breeding and Survival
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Egg Size:
31 x 23 mm
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Egg Weight:
8.5 g (of which 6 % is shell)
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Number of Nest Records:
26
(more would be welcome!)
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Clutch Size:
4 - 5 eggs
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4.59 ± 0.95 (2 - 7) N = 240
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Incubation:
18- 18 days
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17.74 ± 1.03 (16 - 19.5) N = 240
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by the:
Male + Female
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Fledging:
20 - 23days
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21.58 ± 2.23 (18 - 25) N = 333
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as:
Altricial, naked
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Source:
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British Trust for Ornithology (2005) Nest Record Scheme data
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First Clutches Laid:
31 Mar (1 Mar - 30 Apr)
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Number of Broods:
1
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Trends in Breeding Productivity
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Number Ringed:
490
(Annual Totals)
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Adult Survival:
0.590
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Juvenile Survival:
0.600 (in First-Year)
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Age at First Breeding:
2
years
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Typical Lifespan:
4
years
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Maximum Recorded Age:
16 years 9 months 19 days (set in 1983)
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Summary of Ringing Recoveries
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Biometrics
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Ring Size:
D (pulli E)
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Wing Length
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Adult:
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181.1 ± 6.2
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Range
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171 - 191 mm, N =1404
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Juvenile:
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178.0 ± 5.6
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170 - 188 mm, N =515
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Male:
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184.8 ± 6.8
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174 - 196 mm, N =152
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Female:
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179.8 ± 5.9
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171 - 190 mm, N =285
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Weight
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Adult:
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166.8 ± 13.99
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Range
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144.0 - 189.0 g , N =1113
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Juvenile:
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162.8 ± 15.65
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139.0 - 184.0 g , N =417
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Male:
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172.0 ± 14.33
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146.0 - 197.0 g , N =116
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Female:
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164.0 ± 14.23
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143.4 - 187.0 g , N =234
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Source:
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British Trust for Ornithology (2005) Ringing Scheme data
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Other Names
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Eurasian Jay
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Gaelic:
Sgreuchag-choille
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Welsh:
Ysgrech y Coed
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Danish:
Skovskade
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Dutch:
Vlaamse gaai
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Finnish:
Närhi
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French:
Geai des chênes
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German:
Eichelhäher
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Hungarian:
Szajkó
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Icelandic:
Skrækskaði
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Irish:
Scréachóg
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Italian:
Ghiandaia
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Norwegian:
Nøtteskrike
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Polish:
Sójka zwyczajna
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Portuguese:
Gaio-comum
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Spanish:
Arrendajo común
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Swedish:
Nötskrika
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Local Names:Acorn Jay
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Collective Noun:Party
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For More Information...
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Books and Monographs:
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No books written recently
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See Also:
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Find scientific papers on  Google Scholar
or  Scirus by clicking the icon
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Wikipedia entry
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BirdLife species page
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Recent sightings and information from BirdGuides
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State of the Nations Birds by Chris Mead
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