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MISTLE THRUSH Turdus viscivorus
 
Conservation Listings Long term trend

Unlisted/Green
Biodiversity Steering Group: Unlisted

UK: Moderate decline
Farmland: Rapid decline
 
Status Summary
Like those of Song Thrush and Blackbird, Mistle Thrush populations have declined significantly since the mid-1970s, especially on farmland, but the BBS in particular suggests that the 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).
 
 
Table of population changes for Mistle Thrush
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 143 -43 -51 -33 >25  
  25 1973-1998 148 -43 -51 -35 >25  
  10 1988-1998 129 -19 -27 -11    
  5 1993-1998 128 -15 -21 -8    
CBC farmland 30 1968-1998 61 -59 -68 -50 >50  
  25 1973-1998 59 -56 -63 -47 >50  
  10 1988-1998 54 -22 -33 -9    
  5 1993-1998 53 -19 -29 -10    
CBC woodland 30 1968-1998 57 -22 -42 9    
  25 1973-1998 62 -26 -44 -2 >25  
  10 1988-1998 62 -13 -26 5    
  5 1993-1998 63 -10 -20 0    
BBS UK 5 1994-1999 907 -4 -12 4    
BBS England 5 1994-1999 743 -4 -12 5    
BBS Scotland 5 1994-1999 57 29 -9 83    
BBS Wales 5 1994-1999 70 14 -14 53    
BBS N.Ireland 5 1994-1999 32 -60 -77 -30 (>50) Small sample
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
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 30 1968-1998 40 Linear increase 3.87 eggs 4.05 eggs 0.18 eggs  
Brood size 30 1968-1998 74 None        
Daily failure rate (eggs) 30 1968-1998 65 None        
Daily failure rate (chicks) 30 1968-1998 67 None        
Laying date 30 1968-1998 33 None        
 
Insufficient data on CES
available for this species

 

   



The report should be cited as: Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Bashford, R.I., Beaven, L.P., Freeman, S.N., Marchant, J.H., Noble, D.G., Raven, M.J., Siriwardena, G.M., Thewlis, R. and Wernham, C.V. (2001) Breeding Birds in the Wider Countryside: their conservation status 2000. BTO Research Report No. 252. BTO, Thetford. (http://www.bto.org/birdtrends)

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