Population and Distribution
Population Trend:
No population trend available
Distribution:
Atlas Maps
(Local Atlases )
British Population Size:
Summer:
5078 males
in 2005
 
First Record:
15th Century
[Fossil evidence from
Devensian (last) glaciation, 10-120,000 yr ago]
Latest Survey:
Eaton, M.A. et al. (2006) State of the UK's birds 2005 RSPB, Sandy
Conservation Status:
RED
because
Historical Population Decline,
Recent Breeding Population Decline (1981-2007),
Previous Assessments:
2002-2007
RED
1996-2001
RED
Races of Concern:
britannicus RED (Recent Decline)
UK Biodiversity Action Plan
(Lead Partner: GCT, RSPB)
Habitat Occupancy (in the Breeding Season):
No habitat data from BBS
European Population Size:
Summer:
515 thousand to 1.1 million pairs
Population Assesment from Birds in Europe
Distribution in Europe
Listed on the Appendices/Schedules of:
WBD(I*,II*,III*), Bern(III)
Survey Results:
BirdTrack
Breeding and Survival
Egg Size:
50 x 36 mm
Egg Weight:
35.5 g (of which 7 % is shell)
Number of Nest Records:
2
Clutch Size:
6 - 11 eggs
Incubation:
25- 27 days
by the:
Female
Fledging:
10 - 14days
as:
Precocial, downy
First Clutches Laid:
Unavailable
Number of Broods:
1
Number Ringed:
5
(Annual Totals )
Adult Survival:
0.720
± 0.070
Juvenile Survival:
0.460 (in First-Year)
Age at First Breeding:
Typical Lifespan:
No data
Maximum Recorded Age:
3 years 9 months 18 days (set in 1962)
Summary of Ringing Recoveries
Biometrics
Ring Size:
G*
Wing Length
Adult:
Insufficient Data
Juvenile:
Insufficient Data
Male:
Insufficient Data
Female:
Insufficient Data
Weight
Adult:
Insufficient Data
Juvenile:
Insufficient Data
Male:
Insufficient Data
Female:
Insufficient Data
Other Names
Gaelic:
Coileach-dubh
Welsh:
Grugiar Ddu
Danish:
Urfugl
Dutch:
Korhoen
Finnish:
Teeri
French:
Tétras lyre
German:
Birkhuhn
Hungarian:
Nyírfajd
Icelandic:
Orri
Irish:
Italian:
Fagiano di monte
Norwegian:
Orrfugl
Polish:
Cietrzew zwyczajny
Portuguese:
Galo-lira
Spanish:
Gallo lira
Swedish:
Orre
Local Names: Blackcock (m) Grey Hen (f)
For More Information...
Books and Monographs:
Lindstrom, J. et al. 1998 BWP Update 2:173-191
Madge, S. & MacGowan, P. 2002 Pheasants, partridges and grouse Pica Press, Sussex
[598.544 MAD]
Watson, A. & Moss, R. 2008 Grouse Collins, London
[598.543 WAT]
See Also:
Find scientific papers on Google Scholar
or Scirus by clicking the icon
Wikipedia entry
BirdLife species page
Recent sightings and information from BirdGuides
State of the Nations Birds by Chris Mead