Reed Warbler Acrocephalus scirpaceus   [Hermann, 1804]

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   Page updated:16-January-2013

Order: Passeriformes Family: Sylviidae
BTO Codes: RW, REEWA EURING No: 12510
Number in Britain: 91 thousand pairs (Summer)
Conservation Status:
UK: GREEN
European: Not a species of concern
Global: (Details)
Links to: Images   Videos   Sound  
Tips on  Identification
Status in UK: (A)  Migrant Breeder, Passage Visitor
Subspecies: scirpaceus recorded in Britain (of 3 subsp. in the world)
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Length: 13 cm Wingspan: 19 cm Weight: M/F: 13 g    
Scientific name from: Gr.: akros=pointed + kephale=head and L.: scirpus=a reed + =aceus=resembling
World Distribution: BREEDS: Europe, Near East & c Asia, WINTERS: tropical Africa
Habitat: Reedbed, scrub
Diet: Insects and spiders also small snails, often at middle heights in reeds, rushes
TitBit: In many birds, eye colour changes with age - in Reed Warblers birds have a charcoal iris in their first year but an olive-brown one as adults; young birds also have spots on their tongues (as many other species do), presumably to help guide feeding parent.  

Population and Distribution

Population Trend: BirdTrends   
Regional Trends: England   English Regions
Distribution: Atlas Maps   
British Population Size:
    Summer: 61 to 122 thousand pairs in 2000
    First Record: Essex, 1785
    Conservation Status: GREEN
   Previous Assessments: 2002-2007 GREEN     1996-2001 GREEN  
   Races of Concern: scirpaceus GREEN
Habitat Occupancy (in the Breeding Season):
    Most frequent in: Reedbed
    Also common in: Estuaries
    And found in: Along Rivers, Lakes
Relative Frequency in Each Habitat:
Migration routes: Map of foreign ringing recoveries  and summary map from Time to Fly (in pop-up windows)
European Population Size:
    Summer: 2.6 to 4.5 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: Bern(III), Bonn(II)
Survey Results: Results from BirdTrack

Breeding and Survival

Egg Size: 18 x 14 mm Egg Weight: 1.8 g (of which 5 % is shell)
Number of Nest Records: 609
Clutch Size: 4 eggs 3.88 ± 0.69 (2 - 6) N = 3455
Incubation: 12- 12 days 11.73 ± 0.91 (10 - 13.5) N = 3453   by the: Male + Female
Fledging: 12 - 13days 11.68 ± 0.76 (10 - 12.5) N = 3814 as: Altricial, naked
Source:
British Trust for Ornithology (2005) Nest Record Scheme data
First Clutches Laid: 10 Jun (15 May - 21 Jul)
Number of Broods: 1-2
See trends in Breeding Productivity
Number Ringed: Annual Totals
Adult Survival: 0.560       
Juvenile Survival: No data
Age at First Breeding: 1 year Typical Lifespan: 3 years
Maximum Recorded Age: 12 years 11 months 21 days (set in 2001)
Read a summary of Ringing Recoveries

Biometrics

Ring Size: A
Wing Length Adult: 65.5 ± 1.8     Range 54.5 - 75.0 mm, (N = 33113)
Juvenile: 64.5 ± 1.7     Range 54.5 - 75.0 mm, (N = 229414)
Male: 66.3 ± 1.7     Range 55.0 - 75.0 mm, (N = 10905)
Female: 64.6 ± 1.6     Range 55.0 - 75.0 mm, (N = 9169)
Weight Adult: 11.54 ± 1.00 Range 7.30 - 15.30 g , (N =27827)
Juvenile: 11.2 ± 0.9 Range 7.4 - 15.3 . , (N =201693)
Male: 11.32 ± 0.70 Range 8.20 - 15.30 g , (N =8909)
Female: 11.72 ± 1.20 Range 7.50 - 15.30 g , (N =7595)
Seasonal: Summer 11.45 ± 0.89 (N = 60479)   Autumn 11.93 ± 1.12 (N = 14803)  
Source: British Trust for Ornithology (2005) Ringing Scheme data

Other Names

Eurasian Reed Warbler
Gaelic: Ceileiriche-cuilc Welsh: Telor y Cyrs
Danish: Rørsanger Dutch: Kleine karekiet
Finnish: Rytikerttunen French: Rousserolle effarvatte
German: Teichrohrsänger Hungarian: Cserrego nádiposzáta
Icelandic: Sefsöngvari Irish: Ceolaire Giolcaí
Italian: Cannaiola Norwegian: Rørsanger
Polish: Trzcinniczek zwyczajny Portuguese: Rouxinol-pequeno-dos-caniços
Spanish: Carricero común Swedish: Rörsångare

For More Information...

Books and Monographs:
   Calvert, M. 2005 Reed Warblers at Rostherne Mere English Nature, Peterborough [598.915 CAL]
   Brown, P.E & Davies, M.G. 1949 Reed Warblers Foy Publications, East Molesey, Surrey [598.915 BRO]
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