Population and Distribution
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British Population Size:
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Summer:
6157 to 7549 pairs
in 1999
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First Record:
Recorded in Medieval times
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Latest Survey:
Wotton, S.R. et al. (2002) Bird Study 49:26-34
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Conservation Status:
RED
because
Recent Breeding Population Decline (1981-2007),
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Previous Assessments:
2002-2007
RED
1996-2001
AMBER
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Races of Concern:
torquatus RED (Recent Decline)
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Habitat Occupancy (in the Breeding Season):
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No habitat data from BBS
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Migration routes:
Summary map from Time to Fly (in pop-up window)
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Average Day of First Arrival:
28 Mar
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European Population Size:
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Summer:
185 to 570 thousand pairs
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Population Assesment from Birds in Europe
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Distribution in Europe mapped by the EBCC Atlas
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Listed on the Appendices/Schedules of:
Bern(III), Bonn(II)
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Breeding and Survival
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Egg Size:
30 x 22 mm
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Egg Weight:
7.4 g (of which 6 % is shell)
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Number of Nest Records:
45
(more would be welcome!)
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Clutch Size:
4 eggs
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4.00 ± 0.51 (2 - 6) N = 305
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Incubation:
13 days
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13.18 ± 0.57 (12.5 - 14.5) N = 305
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by the:
Male + Female
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Fledging:
14 - 14days
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13.71 ± 0.57 (12.5 - 14.5) N = 738
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as:
Altricial, downy
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Source:
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British Trust for Ornithology (2005) Nest Record Scheme data
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First Clutches Laid:
4 May (19 Apr - 8 Jun)
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Number of Broods:
1-2
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See trends in Breeding Productivity
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Number Ringed:
Annual Totals
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Adult Survival:
0.420
± 0.010
(M:0.470
± 0.020;
F:0.370
± 0.020)
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Juvenile Survival:
0.360 (in First-Year)
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Age at First Breeding:
1
year
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Typical Lifespan:
2
years
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Maximum Recorded Age:
6 years 5 months 23 days (set in 1980)
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Read a summary of Ringing Recoveries
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Biometrics
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Ring Size:
C
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Wing Length
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Adult:
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143.5 ± 3.6
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Range
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138 - 150 mm, N =139
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Juvenile:
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142.9 ± 3.7
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137 - 148 mm, N =163
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Male:
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145.3 ± 3.1
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140 - 151 mm, N =75
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Female:
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141.2 ± 2.8
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136 - 146 mm, N =62
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Weight
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Adult:
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106.1 ± 11.59
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Range
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91.00 - 128.0 g , N =127
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Juvenile:
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104.2 ± 9.84
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89.00 - 123.0 g , N =148
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Male:
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107.0 ± 12.26
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90.00 - 129.0 g , N =66
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Female:
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104.8 ± 10.71
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91.00 - 126.0 g , N =59
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Source:
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British Trust for Ornithology (2005) Ringing Scheme data
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Other Names
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Gaelic:
Lňn-monaidh
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Welsh:
Mwyalchen y Mynydd
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Danish:
Ringdrossel
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Dutch:
Beflijster
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Finnish:
Sepelrastas
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French:
Merle ŕ plastron
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German:
Ringdrossel
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Hungarian:
Örvös rigó
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Icelandic:
Mánaţröstur
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Irish:
Lon Creige
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Italian:
Merlo dal collare
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Norwegian:
Ringtrost
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Polish:
Drozd obrozny
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Portuguese:
Merlo-de-peito-branco
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Spanish:
Mirlo capiblanco
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Swedish:
Ringtrast
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For More Information...
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Books and Monographs:
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Simms, E. 1978 British Thrushes Collins, London
[598.911 SIM]
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See Also:
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Find scientific papers on  Google Scholar
or  Scirus by clicking the icon
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Wikipedia entry
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BirdLife species page
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Recent sightings and information from BirdGuides
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Read State of the Nations Birds by Chris Mead
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BirdTrack