Willow Tit Poecile montana   [von Baldenstein, 1827]

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   Page updated:16-January-2013

Order: Passeriformes Family: Paridae
BTO Codes: WT, WILTI EURING No: 14420
Number in Britain: 8500 territories (Summer)
Conservation Status:
UK: RED
European: Not a species of concern
Global: (Details)
Links to: Images   Videos   Sound  
Tips on  Identification
Status in UK: (A)  Resident Breeder
Subspecies: kleinschmidti (R), borealis (V) recorded in Britain (of 11 subsp. in the world)
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Length: 12 cm Wingspan: 19 cm Weight: M/F: 12 g    
Scientific name from: Gr.: poikolos=spotted and L.: montanus=mountaineer (from mons=mountain)
World Distribution: Eurasia
Habitat: Forest, woodland, often near water
Diet: Summer, invertebrates, winter, also seeds

Population and Distribution

Population Trend: BirdTrends   
Regional Trends: England   English Regions
Distribution: Atlas Maps   
British Population Size:
    Summer: 8500 territories in 2000     Note: Best estimate
    First Record: Greater London, 1898
    Latest Survey: Perrins, C.M. (2003) British Birds 96:418-426
    Conservation Status: RED because Recent Breeding Population Decline,
   Previous Assessments: 2002-2007 RED     1996-2001 AMBER  
   Races of Concern: kleinschmidti RED (Recent Decline)
Habitat Occupancy (in the Breeding Season):
    Common in: Scrub
    Also found in: Deciduous Wood, Coniferous Wood
Relative Frequency in Each Habitat:
European Population Size:
    Summer: 4 to 7 million pairs
Population Assesment from Birds in Europe
Distribution in Europe mapped by the EBCC Atlas
Listed on the Appendices/Schedules of: Bern(III)
Survey Results: Results from BirdTrack
Results from Garden BirdWatch

Breeding and Survival

Egg Size: 16 x 12 mm Egg Weight: 1.3 g (of which 6 % is shell)
Number of Nest Records: 9
Clutch Size: 6 - 8 eggs 7.07 ± 1.76 (2 - 12) N = 60
Incubation: 14- 14 days 13.64 ± 1.16 (12 - 15.300000191) N = 60   by the: Female
Fledging: 17 - 20days 18.44 ± 1.74 (16 - 21) N = 194 as: Altricial, downy
Source:
British Trust for Ornithology (2005) Nest Record Scheme data
First Clutches Laid: 28 Apr (16 Apr - 18 May)
Number of Broods: 1
See trends in Breeding Productivity
Number Ringed: Annual Totals
Adult Survival: 0.630    (M:0.650 ± 0.020; F:0.600 ± 0.020)      
Juvenile Survival: 0.590 (in First-Year)  
Age at First Breeding: 1 year Typical Lifespan: 3 years
Maximum Recorded Age: 10 years 4 months 18 days (set in 1984)
Read a summary of Ringing Recoveries

Biometrics

Ring Size: A
Wing Length Adult: 59.6 ± 2.0     Range 52.0 - 67.0 mm, (N = 702)
Juvenile: 59.5 ± 1.8     Range 52.0 - 68.0 mm, (N = 4112)
Male: 60.8 ± 1.6     Range 55.0 - 65.0 mm, (N = 62)
Female: 59.1 ± 1.9     Range 55.0 - 64.0 mm, (N = 94)
Weight Adult: 10.03 ± 0.68 Range 7.90 - 12.50 g , (N =500)
Juvenile: 9.8 ± 0.6 Range 7.4 - 12.3 . , (N =3379)
Male: 10.19 ± 0.73 Range 9.00 - 12.00 g , (N =43)
Female: 10.12 ± 0.78 Range 8.00 - 12.40 g , (N =68)
Seasonal: Summer 10.05 ± 0.67 (N = 429)   Autumn 10.04 ± 0.60 (N = 201)   Winter 10.01 ± 0.62 (N = 486)  
Source: British Trust for Ornithology (2005) Ringing Scheme data

Other Names

Previously Parus montanus 
Gaelic: Cailleachag-sheilich Welsh: Titw'r Helyg
Danish: Fyrremejse Dutch: Matkop
Finnish: Hömötiainen French: Mésange boréale
German: Weidenmeise Hungarian: Kormosfeju cinege
Icelandic: Votmeisa Irish:
Italian: Cincia bigia alpestre Norwegian: Granmeis
Polish: Czarnoglówka Portuguese: Chapim-sibilino
Spanish: Carbonero sibilino Swedish: Talltita

For More Information...

Books and Monographs:
   Perrins, C. 1979 British tits Collins, London [598.922 PER]
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