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SPOTTED FLYCATCHER Muscicapa striata
 
Conservation Listings Long term trend

Table 3/Red
(>=50% Population decline)

Biodiversity Steering Group
Priority Species List

UK: Rapid decline
 
Status Summary
Spotted Flycatchers have declined rapidly and consistently since the 1960s and the CBC decline is also reflected in the trend revealed by the CES. Breeding performance tends to have improved and demographic modelling shows that changes in the annual survival rates of birds in their first year of life are most likely to have driven the decline (Freeman & Crick in prep.), which could have been caused by deteriorating woodland habitats or by conditions on the wintering grounds or along migration routes (Vanhinsbergh et al. 2001).
 
 
Table of population changes for Spotted Flycatcher
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 70 -79 -86 -72 >50  
  25 1973-1998 69 -77 -83 -69 >50  
  10 1988-1998 48 -59 -67 -48 >50  
  5 1993-1998 39 -16 -30 -2    
CBC farmland 30 1968-1998 34 -79 -88 -67 >50  
  25 1973-1998 32 -75 -86 -60 >50  
  10 1988-1998 24 -55 -67 -42 >50  
  5 1993-1998 19 -6 -32 18   Small sample
CBC woodland 30 1968-1998 23 -83 -91 -76 >50  
  25 1973-1998 23 -77 -86 -69 >50  
  10 1988-1998 19 -67 -76 -58 >50 Small sample
  5 1993-1998 16 -23 -40 -4   Small sample
CES adults 14 1984-1998 18 -49 . . [>25] Small sample
  10 1988-1998 19 -53 . . [>50] Small sample
  5 1993-1998 18 -18 . .   Small sample
CES juveniles 14 1984-1998 13 -66 . . [>50*] Small sample
  10 1988-1998 14 -62 . . [>50*] Small sample
  5 1993-1998 12 -41 . . [>25] Small sample
BBS UK 5 1994-1999 194 -11 -25 6    
BBS England 5 1994-1999 143 -24 -38 -7    
BBS Wales 5 1994-1999 20 11 -37 97   Small sample
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Table of productivity information for Spotted Flycatcher
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 30 1968-1998 85 None        
Brood size 30 1968-1998 137 Linear increase 3.64 chicks 3.86 chicks 0.22 chicks  
Daily failure rate (eggs) 30 1968-1998 127 Curvilinear 0.0181 nests/day 0.0169 nests/day -0.0012 nests/day  
Daily failure rate (chicks) 30 1968-1998 113 Linear increase 0.0093 nests/day 0.0145 nests/day 0.0052 nests/day  
Laying date 30 1968-1998 76 None        
Percentage juveniles (CES) 14 1984-1998 25 Smoothed trend 165 productivity index 100 productivity index -39%[>25]  
Percentage juveniles (CES) 10 1988-1998 26 Smoothed trend 107 productivity index 100 productivity index -6%  
Percentage juveniles (CES) 5 1993-1998 24 Smoothed trend 162 productivity index 100 productivity index -38%[>25]  
 
   




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Last updated: 15 March, 2001

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