Lesser Whitethroat Sylvia curruca   [Linnaeus, 1758]

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Order: Passeriformes Family: Sylviidae
BTO Codes: LW, LESWH EURING No: 12740
Number in Britain: 74 thousand Territories (Summer)
Conservation Status:
UK: GREEN
European: Not a species of concern
Global: (Details)
Status in UK: (A)  Migrant Breeder, Passage Visitor
Subspecies: curruca (BW), blythi (S) recorded in Britain (of 7 subsp. in the world)
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Length: 13 cm Wingspan: 18 cm Weight: M/F: 12 g    
Scientific name from: L.: silva=a wood and L.: curruca=a bird mentioned by Juvenal
World Distribution: BREEDS: Eurasia, WINTERS: tropical Africa east to India
Habitat: Woodland, scrub, semi-desert
Diet: Mostly invertebrates, also berries, nectar prior to spring migration
TitBit: This small, grey warbler is unique amongst British birds in that it migrates round the eastern side of the Mediterranean (rather than the more direct route through Gibraltar).  
Identification Tips:
  Images from IBC or search flickr
  Videos from IBC
  Sound from xeno-canto
Crossley ID photos BTO ID Workshop

Population and Distribution

Population Trend: BirdTrends   
Regional Trends: England   English Regions
Distribution: Atlas Mapstore    BBS Maps
British Population Size:
    Summer: 74 thousand Territories in 2009
    First Record: Buckinghamshire, 1787
    Latest Survey: Musgrove, A. et al. (2013) British Birds 106:64-100
    Conservation Status: GREEN
   Previous Assessments: 2002-2007 GREEN     1996-2001 GREEN  
   Races of Concern: curruca GREEN
Habitat Occupancy (in the Breeding Season):
    Common in: Reedbed
Relative Frequency in Each Habitat:
Migration routes: Map of foreign ringing recoveries  and summary map from Time to Fly (in pop-up windows)
Average Day of First Arrival: 23 Apr
European Population Size:
    Summer: 2.8 to 4.8 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: Bern(III), Bonn(II)
Survey Results: Results from BirdTrack

Breeding and Survival

Egg Size: 17 x 13 mm Egg Weight: 1.4 g (of which 6 % is shell)
Number of Nest Records: 14   (more would be welcome!)
Clutch Size: 4 - 5 eggs 4.67 ± 0.64 (2 - 6) N = 209
Incubation: 11- 12 days 11.44 ± 1.10 (9.5 - 13.5) N = 209   by the: Male + Female
Fledging: 12 - 13days 11.73 ± 1.19 (9 - 13.5) N = 314 as: Altricial, naked
Source:
British Trust for Ornithology (2005) Nest Record Scheme data
First Clutches Laid: 19 May (7 May - 27 Jun)
Number of Broods: 1(2)
See trends in Breeding Productivity
Number Ringed: Annual Totals
Adult Survival: 0.329 ± 0.038       
Juvenile Survival: 0.355 (in First-Year)  
Age at First Breeding: 1 year Typical Lifespan: 2 years
Maximum Recorded Age: 9 years 0 months 2 days (set in 2008)
Read a summary of Ringing Recoveries

Biometrics

Ring Size: A
Wing Length Adult: 65.5 ± 1.9 Range 63 - 69 mm, N =3078
Juvenile: 65.6 ± 1.7 63 - 68 mm, N =4634
Male: 65.8 ± 1.8 63 - 69 mm, N =848
Female: 65.0 ± 1.8 62 - 68 mm, N =694
Weight Adult: 11.44 ± 0.93 Range 10.20 - 13.10 g , N =2621
Juvenile: 11.75 ± 1.00 10.40 - 13.50 g , N =4146
Male: 11.25 ± 0.78 10.20 - 12.50 g , N =684
Female: 11.70 ± 1.00 10.30 - 13.50 g , N =574
Source:
British Trust for Ornithology (2005) Ringing Scheme data

Other Names

 
Gaelic: Gealan-coille-beag Welsh: Llwydfron Fach
Danish: Gærdesanger Dutch: Braamsluiper
Finnish: Hernekerttu French: Fauvette babillarde
German: Klappergrasmücke Hungarian: Kis poszáta
Icelandic: Netlusöngvari Irish: Gilphíb Bheag
Italian: Bigiarella Norwegian: Møller
Polish: Piegza Portuguese: Papa-amoras-cinzento
Spanish: Curruca gavilana Swedish: Ärtsångare

For More Information...

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