BTO BirdFacts | Dartford Warbler

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Page updated:16-January-2013

	Order: Passeriformes	Family: Sylviidae
	BTO Codes: DW, DARWA	EURING No: 12620
	Number in Britain: 3200 territories (Summer)
	Conservation Status:
	UK: AMBER
	European: 2 Concern, most in Europe; Depleted
	Global: Near Threatened (Details)
Links to: Images Videos Sound

Status in UK: (A) Resident Breeder
Subspecies: dartfordiensis recorded in Britain (of 3 subsp. in the world)
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Length: 12 cm	Wingspan: 16 cm	Weight: M/F: 10 g

Scientific name from:	L.: silva=a wood and L.: undatus=wavy (from unda=a wave)
World Distribution:	w Europe, nw Africa

Habitat:	Scrub, heath
Diet:	Arthropods, occ. fruit, mainly in low scrub
TitBit:	Really a bird of Mediterranean climes, the Dartford Warbler suffers extremely from cold winters, following the severe winters of 1961/63, the breeding population collapsed from 450 pairs to just 10.

	Population Trend:	No population trend available
	Distribution:	No distribution maps available

British Population Size:

Summer: 3214 territories in 2006 Wotton, S. et al. (2009) British Birds 102:230-246

First Record: 1773 Latham, J. 1781-1801. A general synopsis of birds

Latest Survey: Wotton, S. et al. (2009) British Birds 102:230-246

Conservation Status: AMBER because Species of European Concern, Localised Breeding Population, Eaton, M.A. et al. 2009. British Birds 102:296-341

Previous Assessments: 2002-2007 AMBER Gregory, R.D. et al. 2002. British Birds 95:410-448

1996-2001 RED Gibbons, D.W. et al. 1996. RSPB Conservation Review 10:7-18

Races of Concern: dartfordiensis AMBER (Rare or Localised)

Habitat Occupancy (in the Breeding Season):

No habitat data from BBS

European Population Size:

Summer: 1.9 to 3.7 million pairs (Trend in Numbers) Bufield, I. & Van Bommel, F. (2004) Birds in Europe. Birdlife International, Cambridge.

Population Assesment from Birds in Europe

Distribution in Europe mapped by the EBCC Atlas

Listed on the Appendices/Schedules of: WCA(I,IV),WBD(I), 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: 12
Clutch Size: 4 eggs
Incubation: 12- 14 days		by the: Female (occ. Male)
Fledging: 10 - 14days		as: Altricial, naked

First Clutches Laid: Unavailable
Number of Broods: 2(3)

Number Ringed: Annual Totals
Adult Survival: 0.500 ± 0.083
Juvenile Survival: No data

Age at First Breeding:	Typical Lifespan: No data
Maximum Recorded Age: 3 years 8 months 8 days (set in 1986)
Read a summary of Ringing Recoveries

Biometrics
Ring Size: A
Wing Length	Adult:	53.4 ± 1.5 Range 49.0 - 57.0 mm, (N = 198)
	Juvenile:	52.7 ± 1.3 Range 50.0 - 59.0 mm, (N = 238)
	Male:	53.9 ± 1.4 Range 50.0 - 57.0 mm, (N = 137)
	Female:	52.6 ± 1.4 Range 49.0 - 56.0 mm, (N = 53)

Weight	Adult:	9.46 ± 0.67 Range 7.70 - 11.90 g , (N =173)
	Juvenile:	9.4 ± 0.6 Range 7.9 - 11.0 . , (N =235)
	Male:	9.39 ± 0.60 Range 7.70 - 11.60 g , (N =120)
	Female:	9.56 ± 0.81 Range 7.80 - 11.90 g , (N =45)
	Seasonal:	Summer 9.58 ± 0.77 (N = 54) Autumn 9.73 ± 0.63 (N = 44) Winter 9.49 ± 0.56 (N = 209)
	Source:	British Trust for Ornithology (2005) Ringing Scheme data

Other Names


Gaelic:	Welsh: Telor Dartford
Danish: Provencesanger	Dutch: Provençaalse grasmus
Finnish: Ruskokerttu	French: Fauvette pitchou
German: Provencegrasmücke	Hungarian: Bujkáló poszáta
Icelandic: Busksöngvari	Irish: Ceolaire Fraoigh
Italian: Magnanina	Norwegian: Provencesanger
Polish: Pokrzewka kasztanowata	Portuguese: Felosa-do-mato
Spanish: Zarcero común	Swedish: Provencesångare

Local Names:Furze Wren

For More Information...
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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

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