|
|
British Population Size:
|
Winter:
38 thousand individuals
in 2004-09
|
|
First Record:
1544
[Fossil evidence from
Middle Pleistocene, c. 500,000 yr ago]
|
|
Latest Survey:
Holling, M. & RBBP 2011 British Birds 104:476-537
|
|
Conservation Status:
AMBER
because
Species of European Concern,
Recent Non-breeding Population Decline,
Important Non-breeding Population
|
|
Previous Assessments:
2002-2007
AMBER
1996-2001
AMBER
|
|
Races of Concern:
|
|
|
|
Habitat Occupancy (in the Breeding Season):
|
|
No habitat data from BBS
|
|
|
|
Migration routes:
Map of foreign ringing recoveries
and summary map from Time to Fly (in pop-up windows)
|
|
|
|
European Population Size:
|
|
Summer:
100 to 180 thousand pairs
|
|
Population Assesment from Birds in Europe
|
|
Distribution in Europe mapped by the EBCC Atlas
|
|
|
|
Listed on the Appendices/Schedules of:
WCA(II,III), WBD(II*,III*), Bern(III), Bonn(II), AEWA
|
|
|
Breeding and Survival
|
|
Egg Size:
62 x 44 mm
|
Egg Weight:
66.0 g (of which 9 % is shell)
|
|
|
|
Number of Nest Records:
8
|
|
Clutch Size:
8 - 10 eggs
|
|
|
Incubation:
25 days
|
|
by the:
Female
|
Fledging:
50 - 55days
|
|
as:
Precocial, downy
|
|
|
|
First Clutches Laid:
Unavailable
|
|
Number of Broods:
1
|
|
Number Ringed:
Annual Totals
|
|
Adult Survival:
0.650
± 0.014
|
Juvenile Survival:
0.550 (in First-Year)
|
|
|
|
Age at First Breeding:
1
year
|
Typical Lifespan:
3
years
|
|
Maximum Recorded Age:
22 years 0 months 10 days (set in 1999)
|
|
Read a summary of Ringing Recoveries
|
|
|
Biometrics
|
|
Ring Size:
G*
|
|
Wing Length
|
Sexually dimorphic (female much larger than male)
|
|
|
Male:
|
217.6 ± 6.1
Range
134.0 - 292.0 mm, (N = 436)
|
|
|
Female:
|
209.6 ± 4.6
Range
134.0 - 228.0 mm, (N = 116)
|
|
|
|
Weight
|
Sexually dimorphic (female much larger than male)
|
|
|
Male:
|
1.02 ± 0.10
Range
1.30 - 1460 kg , (N =375)
|
|
|
Female:
|
946.2 ± 91.28
Range
500.0 - 1500 g , (N =97)
|
|
|
Seasonal:
|
Summer 831.4 ± 76.41 (N = 658)
Autumn 838.3 ± 96.22 (N = 311)
Winter 1.05 ± 0.13 (N = 3314)
|
|
|
Source:
|
British Trust for Ornithology (2005) Ringing Scheme data
|
|
|
Other Names
|
|
Common/Northern Pochard
|
|
|
|
|
|
Gaelic:
Lach-dhearg-cheannach
|
Welsh:
Hwtaden Bengoch
|
|
Danish:
Taffeland
|
Dutch:
Tafeleend
|
|
Finnish:
Punasotka
|
French:
Fuligule milouin
|
|
German:
Tafelente
|
Hungarian:
Barátréce
|
|
Icelandic:
Skutulönd
|
Irish:
Póiseard
|
|
Italian:
Moriglione
|
Norwegian:
Taffeland
|
|
Polish:
Glowienka zwyczajna
|
Portuguese:
Zarro-comum
|
|
Spanish:
Porrón común
|
Swedish:
Brunand
|
|
|
|
Local Names:Red-headed/Blue Poker
|
|
Collective Noun:Rush
|
|
|
For More Information...
|
|
Books and Monographs:
|
|
Kear, J 2005 Ducks, geese and swans Oxford University Press
[598.48 KEA]
|
|
Cabot, D. 2009 Wildfowl Collins, London
|
|
|
|
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
|
|
Read State of the Nations Birds by Chris Mead
|
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