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BTO Blueline
MISTLE THRUSH
Turdus viscivorus
Mistle Thrush © Tommy Holden
Conservation listings

Europe: SPEC category 4, secure
UK: Amber (25-50% population decline)

Long-term trend
UK, England: moderate decline
 
Status summary
Like those of Song Thrush and Blackbird, Mistle Thrush populations have declined significantly since the mid 1970s, especially on farmland. The species has recently been moved from the Green to the Amber list because of population decline, but recent BBS data suggest that this decline may now have ceased. There have been no strong trends in breeding performance, and the decline is likely to have been driven by reduced annual survival (Siriwardena et al. 1998).
 
CBC/BBS UK graph
 
Table of population changes for Mistle Thrush
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC/BBS UK 33 1967-2000 334 -36 -49 -18 >25  
  25 1975-2000 400 -39 -48 -29 >25  
  10 1990-2000 724 -11 -19 -2    
  5 1995-2000 1100 3 -3 10    
CBC/BBS England 33 1967-2000 280 -38 -47 -25 >25  
  25 1975-2000 334 -41 -49 -29 >25  
  10 1990-2000 598 -16 -25 -8    
  5 1995-2000 901 -3 -9 3    
BBS UK 8 1994-2002 946 1 -7 9    
BBS England 8 1994-2002 767 -10 -18 -2    
BBS Scotland 8 1994-2002 57 33 -6 88    
BBS Wales 8 1994-2002 81 5 -20 38    
BBS N.Ireland 8 1994-2002 37 42 -11 127    
BBS acknowledgement
 
CBC/BBS England graph
BBS UK graph
BBS England graph
BBS Scotland graph
BBS Wales graph
BBS N Ireland graph
 
Table of productivity information for Mistle Thrush
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 33 1968-2001 39 Linear increase 3.88 eggs 4.05 eggs 0.17 eggs  
Brood size 33 1968-2001 73 None        
Daily failure rate (eggs) 33 1968-2001 63 None        
Daily failure rate (chicks) 33 1968-2001 65 None        
Laying date 33 1968-2001 32 None        
 
Clutch size graph
Brood size graph
Egg nest failure graph
Chick nest failure graph
Laying date graph
Insufficient data on CES
available for this species
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This report should be cited as:
Crick, H.Q.P., Marchant, J.H., Noble, D.G., Baillie, S.R., Balmer, D.E., Beaven, L.P., Coombes, R.H.,
Downie, I.S., Freeman, S.N., Joys, A.C., Leech, D.I., Raven, M.J., Robinson, R.A. and Thewlis, R.M. (2004)
Breeding Birds in the Wider Countryside: their conservation status 2003.
BTO Research Report No. 353. BTO, Thetford. (http://www.bto.org/birdtrends2003)

Pages maintained by Susan Waghorn and Iain Downie: Last updated 16 February, 2009