Marsh Warbler Acrocephalus palustris   [Bechstein, 1798]

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Date created: 23-January-2017

Order: Passeriformes Family: Sylviidae
BTO Codes: MW, MARWA EURING No: 12500
Number in Britain: 50 records/year
Conservation Status:
UK: RED
European: Least Concern
Global: Least Concern (Details)
Status in UK: (A)  Scarce Migrant Breeder, Passage Visitor
Subspecies: Monotypic
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Length: 13 cm Wingspan: 20 cm Weight: M/F: 13 g    
Scientific name from: Gr.: akros=pointed + kephale=head and L.: palus=a marsh
World Distribution: BREEDS: c Europe, Near East, WINTERS: e Africa
Habitat: Scrub, grassland
Diet: Insects and spiders also snails and occ. berries
TitBit: Like many other Acrocephalus warblers, the Marsh warbler is a good songster, and an individual bird can sing for extended periods, sometimes up to an hour continuously, and mimics the songs of birds from both its breeding and wintering range.  
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Identification Tips:
  Images from IBC or search flickr
  Videos from IBC
  Sound from xeno-canto
Crossley ID photos

Population and Distribution

Population Trend: No population trend available
Distribution: Atlas Mapstore   
British Population Size:
    Passage: 50 individuals
    Summer: 5 to . Pairs in
    First Record: Hampshire, 1863
    Latest Survey: Musgrove, A. et al. ((2013)) British Birds 106:64-100
    Conservation Status: RED because Recent Breeding Population Decline (1981-2010), Recent Winter Population Decline (1981-2010), Recent Breeding Range Decline (1981-2010), Recent Winter Range Decline (1981-2010),
   Previous Assessments: 2009-2014 RED     2002-2007 RED     1996-2001 RED  
   Races of Concern:
UK Biodiversity Action Plan (Lead Partner: RSPB, Wildlife Trusts)
Habitat Occupancy (in the Breeding Season):
    No habitat data from BBS
European Population Size:
    Summer: 2.2 to 3.8 million pairs   (Trend in Numbers)
Population Assesment from Birds in Europe
Distribution in Europe mapped by the EBCC Atlas
Listed on the Appendices/Schedules of: WCA(I,IV), Bern(III), Bonn(II), NERC (41)
Survey Results:

Breeding and Survival

Egg Size: 19 x 14 mm Egg Weight: 1.9 g (of which 6 % is shell)
Number of Nest Records: 1
Clutch Size: 4 - 5 eggs
Incubation: 12- 14 days   by the: Male + Female
Fledging: 10 - 11days as: Altricial, naked
First Clutches Laid: Does not breed in Britain, or too few Nest Records
Number of Broods: 1
Number Ringed: Annual Totals
Adult Survival: No data
Juvenile Survival: No data
Age at First Breeding: Typical Lifespan: No data
Maximum Age from Ringing: 7 years 10 months 22 days (set in 1993)
Read a summary of Ringing Recoveries

Biometrics

Ring Size: A
Wing Length Adult: 70.5 ± 1.7 Range 67 - 73 mm, N =53
Juvenile: 68.3 ± 1.6 66 - 71 mm, N =21
Male: Insufficient Data
Female: Insufficient Data
Weight Adult: 12.87 ± 1.10 Range 11.40 - 15.00 g , N =49
Juvenile: 12.70 ± 2.37 9.75 - 17.55 g , N =20
Male: Insufficient Data
Female: Insufficient Data
Source:
British Trust for Ornithology (2005) Ringing Scheme data

Other Names

 
Gaelic: Ceileiriche-fèithe Welsh: Telor y Gwerni
Danish: Kærsanger Dutch: Bosrietzanger
Finnish: Luhtakerttunen French: Rousserolle verderolle
German: Sumpfrohrsänger Hungarian: Énekes nádiposzáta
Icelandic: Seljusöngvari Irish: Ceolaire Corraigh
Italian: Cannaiola verdognola Norwegian: Myrsanger
Polish: Lozówka Portuguese: Felosa-palustre
Spanish: Carricero políglota Swedish: Kärrsångare

For More Information...

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