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SPOTTED FLYCATCHER
Muscicapa striata
Spotted Flycatcher © G H Higgenbotham
Conservation listings

Europe: SPEC category 3, declining
UK: Red (>50% population decline)

Long-term trend
UK, England: rapid decline
Status summary
Spotted Flycatchers have declined rapidly and consistently since the 1960s and the CBC/BBS decline is also reflected in the trend revealed by CES. Breeding performance as measured by NRS and CES has tended to improve over this period. Demographic modelling shows that decreases in the annual survival rates of birds in their first year of life are most likely to have driven the decline (Freeman & Crick 2003). Decreasing survival rates may have been caused by deteriorating woodland habitats, or by conditions either on the wintering grounds or along migration routes (Vanhinsbergh et al. 2001). Since trends have been similar across UK regions and habitats, it is more likely that the decline has been driven by factors operating outside the UK.
 
CBC/BBS UK graph
 
Table of population changes for Spotted Flycatcher
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC/BBS UK 33 1967-2000 110 -82 -88 -75 >50  
  25 1975-2000 120 -78 -84 -68 >50  
  10 1990-2000 168 -51 -61 -39 >50  
  5 1995-2000 240 -13 -25 3    
CBC/BBS England 33 1967-2000 86 -83 -88 -78 >50  
  25 1975-2000 93 -80 -85 -72 >50  
  10 1990-2000 125 -52 -62 -39 >50  
  5 1995-2000 176 -11 -25 2    
CES adults 17 1984-2001 16 -61 . . [>50] Small sample
  10 1991-2001 15 -50 . . [>50] Small sample
  5 1996-2001 14 -28 . . [>25] Small sample
CES juveniles 17 1984-2001 12 -65 . . [>50] Small sample
  10 1991-2001 12 -53 . . [>50] Small sample
  5 1996-2001 11 -26 . . [>25] Small sample
BBS UK 8 1994-2002 194 -42 -52 -31 (>25)  
BBS England 8 1994-2002 142 -35 -47 -20 (>25)  
BBS acknowledgement
 
CBC/BBS England graph
CES adult abundance graph
CES juvenile abundance graph
BBS UK graph
BBS England graph
 
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 33 1968-2001 83 None        
Brood size 33 1968-2001 134 Curvilinear 3.61 chicks 3.7 chicks 0.09 chicks  
Daily failure rate (eggs) 33 1968-2001 123 None        
Daily failure rate (chicks) 33 1968-2001 110 None        
Laying date 33 1968-2001 74 None        
Percentage juveniles (CES) 17 1984-2001 23 Smoothed trend 75 productivity index 101 productivity index 33%  
Percentage juveniles (CES) 10 1991-2001 22 Smoothed trend 60 productivity index 101 productivity index 66%  
Percentage juveniles (CES) 5 1996-2001 20 Smoothed trend 72 productivity index 101 productivity index 40%  
 
Clutch size graph
Brood size graph
Egg nest failure graph
Chick nest failure graph
Laying date graph
CES productivity graph
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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