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Gadwall Anas strepera [Linnaeus, 1758]
Other Names
Trends & Distribution
Breeding & Survival
Biometrics
Books & Links
Order:
Anseriformes
Family:
Anatidae
BTO Codes:
GA , GADWA
EURING No:
1820
Number in Britain:
790 pairs (Summer)
Conservation Status:
UK:
AMBER
European:
3 Concern, most not in Europe; Depleted
Global:
Least Concern
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IBC
Status in UK:
(AC2) Migrant/Resident Breeder, Winter Visitor
Subspecies:
Monotypic
.
Length:
51 cm
Wingspan:
90 cm
Weight:
M: 830 g F: 700 g
Scientific name from:
L.: anas =a duck
and L.: streperus =noisy
World Distribution:
BREEDS: Europe, n&c Asia, North America, WINTERS: south to n&e Africa, s Asia & s US
Habitat:
Marshes, lakes, on migration also rivers, estuaries
Diet:
Leaves, shoots, mostly while swimming with head under water
Population and Distribution
Population Trend:
No population trend available
Distribution:
New Atlas )
British Population Size:
Summer:
790 pairs
in 1988
Winter:
17 thousand individuals
in 1994-99
First Record:
1666
First Breeding Record:
East Anglia 1850
Latest Survey:
Fox, A.D. (1988) British Birds 81:51-66
Habitat Occupancy (in the Breeding Season):
No habitat data from BBS
European Population Size:
Summer:
28 to 35 thousand pairs
Birds in Europe
Listed on the Appendices/Schedules of:
WCA(II), WBD(II*), Bern(III), Bonn(II), AEWA
Survey Results:
Breeding and Survival
Egg Size:
55 x 39 mm
Egg Weight:
44.0 g (of which 8 % is shell)
Number of Nest Records:
9
Clutch Size:
9 - 11 eggs
Incubation:
24 - 26 days
by the:
Female
Fledging:
45 - 50 days
as:
Precocial, downy
First Clutches Laid:
Unavailable
Number of Broods:
1
Number Ringed:
209
Adult Survival:
No data
Juvenile Survival:
No data
Age at First Breeding:
1
year
Typical Lifespan:
No data
Maximum Recorded Age:
21yr3m
Biometrics
Ring Size:
F*
Wing Length
Adult:
264.3 ± 10.3
Range
247 - 280 mm, N =198
Juvenile:
254.1 ± 13.9
231 - 271 mm, N =29
Male:
271.7 ± 6.9
260 - 284 mm, N =106
Female:
255.7 ± 6.1
245 - 265 mm, N =91
Weight
Adult:
809.5 ± 105.0
Range
650.0 - 980.0 g , N =183
Juvenile:
748.8 ± 90.21
610.0 - 920.0 g , N =29
Male:
839.6 ± 98.22
675.0 - 990.0 g , N =95
Female:
777.8 ± 103.2 .
630.0 - 980.0 g , N =87
Source:
British Trust for Ornithology (2005) Ringing Scheme data
Other Names
Gaelic:
Lach-ghlas
Welsh:
Hwyaden Lwyd
Danish:
Knarand
Dutch:
Krakeend
Finnish:
Harmaasorsa
French:
Canard chipeau
German:
Schnatterente
Hungarian:
Kendermagos réce
Icelandic:
Gargönd
Irish:
Gadual
Italian:
Canapiglia
Norwegian:
Snadderand
Polish:
Krakwa
Portuguese:
Frisada
Spanish:
Anade friso
Swedish:
Snatterand
Local Names: Grey Duck
For More Information...
Books and Monographs:
Kear, J 2005 Ducks, geese and swans Oxford University Press
[598.48 KEA]
See Also:
All About Birds (Cornell Lab of Ornithology)
Gough, G.A. et al. (1998) Patuxent Bird Identification Infocenter
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