British Population Size:
Summer:
5299 pairs
in 1990
Winter:
74 thousand individuals
in 2004-09
 
First Record:
Recorded in Anglo-Saxon times
Conservation Status:
GREEN
Previous Assessments:
2002-2007
AMBER
1996-2001
GREEN
Races of Concern:
Habitat Occupancy (in the Breeding Season):
Most frequent in:
Along Rivers
Also common in:
Lakes
And found in:
Estuaries, Ponds
Relative Frequency in Each Habitat:
Migration routes:
Map of foreign ringing recoveries
European Population Size:
Summer:
71 to 100 thousand pairs
Population Assesment from Birds in Europe
Distribution in Europe mapped by the EBCC Atlas
Listed on the Appendices/Schedules of:
WBD(II*), Bern(III), Bonn(II), AEWA
Breeding and Survival
Egg Size:
113 x 74 mm
Egg Weight:
340.0 g (of which 11 % is shell)
Number of Nest Records:
193
Clutch Size:
4 - 7 eggs
5.58 ± 1.84 (2 - 12) N = 686
Incubation:
34- 45 days
38.62 ± 5.01 (31.5 - 44.5) N = 686
by the:
Female (occ. Male)
Fledging:
120 - 150days
as:
Precocial, downy
Source:
British Trust for Ornithology (2005) Nest Record Scheme data
First Clutches Laid:
18 Apr (10 Mar - 23 May)
Number of Broods:
1
See trends in Breeding Productivity
Number Ringed:
Annual Totals
Adult Survival:
0.850
± 0.009
Juvenile Survival:
0.420 (to age 3 )
Age at First Breeding:
4
years
Typical Lifespan:
10
years
Maximum Recorded Age:
27 years 6 months 27 days (set in 2010)
Read a summary of Ringing Recoveries
Biometrics
Ring Size:
M*
Wing Length
Sexually dimorphic (male much larger than female)
Male:
627.2 ± 18.7
Range
544.0 - 680.0 mm, (N = 81)
Female:
588.1 ± 22.6
Range
502.0 - 645.0 mm, (N = 68)
Weight
Sexually dimorphic (male much larger than female)
Male:
10.42 ± 1.56
Range
13.40 - 15500 kg , (N =314)
Female:
8.78 ± 1.23
Range
6.30 - 10.50 kg , (N =233)
Seasonal:
Summer 9.47 ± 1.40 (N = 707)  
Autumn 9.87 ± 1.75 (N = 789)
Winter 9.58 ± 1.57 (N = 489)  
Source:
British Trust for Ornithology (2005) Ringing Scheme data
Other Names
Gaelic:
Eala
Welsh:
Alarch Dôf
Danish:
Knopsvane
Dutch:
Knobbelzwaan
Finnish:
Kyhmyjoutsen
French:
Cygne taberculé
German:
Höckerschwan
Hungarian:
Bütykös hattyú
Icelandic:
Hnúðsvanur
Irish:
Eala Bhalbh
Italian:
Cigno reale
Norwegian:
Knoppsvane
Polish:
Labedz niemy
Portuguese:
Cisne-vulgar
Spanish:
Cisne real
Swedish:
Knölsvan
For More Information...
Books and Monographs:
Birkhead, M. 1986 The mute swan Croom Helm Ltd, London
[598.484 BIR]
Kear, J 2005 Ducks, geese and swans Oxford University Press
[598.48 KEA]
Ticehurst, N.F. 1957 The Mute Swan in England Cleaver Hume, London
[598.484 TIC]
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
All About Birds (from the Cornell Lab of Ornithology)
Details from the Patuxent Bird Identification Infocenter
Read State of the Nations Birds by Chris Mead