Status in UK:
(A) Migrant/Resident Breeder, Passage Visitor
Subspecies:aeruginosus recorded in Britain (of 2 subsp. in the world)
.
Length:
52 cm
Wingspan:
122 cm
Weight:
M: 540 g F: 670 g
Scientific name from:
Gr.: kirkos=a type of hawk
and L.: aerugo=copper rust + -osus=full of
World Distribution:
BREEDS w Europe to c Asia & n Africa, WINTERS: south to c Africa & s Asia
Habitat:
Marsh and reedbeds
Diet:
Animals from ground, especially in marshy areas, preference for easily caught prey
TitBit:
The Marsh Harrier almost died out as a British breeding species, but has recovered since the 1960s and chnaged its behaviour along the way, nesting in farmland and many individuals staying in Britain for the winter
Population and Distribution
Population Trend:
No population trend available
Distribution:
No distribution maps available
British Population Size:
Summer:
360 females
in 2005
First Record:
1544
Latest Survey:
Eaton, M.A. et al. (2006) State of the UK's birds 2005 RSPB, Sandy
Habitat Occupancy (in the Breeding Season):
No habitat data from BBS
European Population Size:
Summer:
53 to 80 thousand pairs
Population Assesment from Birds in Europe
Distribution in Europe
Listed on the Appendices/Schedules of:
WCA(I,IV), Bern(III), Bonn(II), CITES(II)
Survey Results:
BirdTrack
Breeding and Survival
Egg Size:
50 x 39 mm
Egg Weight:
40.0 g (of which 9 % is shell)
Number of Nest Records:
6
Clutch Size:
4 - 5 eggs
Incubation:
31 - 38 days
by the:
Female
Fledging:
35 - 40 days
as:
Altricial, downy
First Clutches Laid:
Unavailable
Number of Broods:
1
Number Ringed:
109
Adult Survival:
0.74
Juvenile Survival:
0.151 (to age 3 )
Age at First Breeding:
3
years
Typical Lifespan:
6
years
Maximum Recorded Age:
3yr9m
(Germany: 20yr 1m)
Biometrics
Ring Size:
F
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
Western / Eurasian Marsh Harrier
Gaelic:
Clamhan-lòin
Welsh:
Bod y Gwerni
Danish:
Rørhøg
Dutch:
Bruine kiekendief
Finnish:
Ruskosuohaukka
French:
Busard des roseaux
German:
Rohrweihe
Hungarian:
Barna rétihéja
Icelandic:
Brúnheiðir
Irish:
Cromán Móna
Italian:
Falco di palude
Norwegian:
Sivhauk
Polish:
Blotniak stawowy
Portuguese:
Tartaranhão-ruivo-dos-paúis
Spanish:
Aguilucho lagunero
Swedish:
Brun kärrhök
Local Names: Duck Hawk
For More Information...
Books and Monographs:
Clarke, R. 1995 The marsh harrier Hamlyn, London
[598.521 CLA]
Simmons, R. 2000 Harriers of the world : their behaviour and ecology Oxford University Press, Oxford
[598.521 SIM]
Clarke, R. 1990 Harriers of the British Isles Shire Publications, Princes Risborough
[Jour: S]
See Also:
Wikipedia entry
State of the Nations Birds by Chris Mead
Recent sightings and information from BirdGuides.com
These data should be cited as: Robinson, R.A. (2005) BirdFacts: profiles of birds occurring in Britain & Ireland (v1.21, Jun 2008). BTO Research Report 407, BTO, Thetford (http://www.bto.org/birdfacts)
button; for sources point at the 
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Other Names
