The British Trust for Ornithology
SPOTTED FLYCATCHER
Muscicapa striata
Spotted Flycatcher © G H Higgenbotham
Conservation listings

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

Biodiversity Steering Group
Priority Species List

  Long-term trend
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 has displayed a tendency to improve over this period and 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 in prep.). Decreasing survival rates may 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 31 1968-1999 69 -79 -86 -71 >50  
  25 1974-1999 67 -75 -83 -67 >50  
  10 1989-1999 44 -52 -63 -42 >50  
  5 1994-1999 38 -4 -23 15    
CBC farmland 31 1968-1999 33 -80 -89 -70 >50  
  25 1974-1999 31 -75 -86 -60 >50  
  10 1989-1999 22 -51 -67 -35 >50  
  5 1994-1999 19 -3 -29 28   Small sample
CBC woodland 31 1968-1999 22 -81 -91 -72 >50  
  25 1974-1999 23 -73 -84 -63 >50  
  10 1989-1999 18 -58 -70 -47 >50 Small sample
  5 1994-1999 16 5 -20 36   Small sample
CES adults 15 1984-1999 18 -60 . . [>50] Small sample
  10 1989-1999 19 -61 . . [>50] Small sample
  5 1994-1999 16 -35 . . [>25] Small sample
CES juveniles 15 1984-1999 13 -63 . . [>50] Small sample
  10 1989-1999 14 -56 . . [>50] Small sample
  5 1994-1999 12 -37 . . [>25] Small sample
BBS UK 6 1994-2000 199 -21 -34 -6    
BBS England 6 1994-2000 146 -24 -38 -7    
BBS Scotland 6 1994-2000 22 -26 -61 37   Small sample
BBS Wales 6 1994-2000 22 13 -30 84   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 31 1968-1999 84 None        
Brood size 31 1968-1999 136 Linear increase 3.65 chicks 3.85 chicks 0.2 chicks  
Daily failure rate (eggs) 31 1968-1999 125 None        
Daily failure rate (chicks) 31 1968-1999 111 Linear increase 0.0094 nests/day 0.0142 nests/day 0.0048 nests/day  
Laying date 31 1968-1999 75 None        
Percentage juveniles (CES) 15 1984-1999 24 Smoothed trend 76 productivity index 100 productivity index 32%  
Percentage juveniles (CES) 10 1989-1999 26 Smoothed trend 50 productivity index 100 productivity index 99%  
Percentage juveniles (CES) 5 1994-1999 23 Smoothed trend 77 productivity index 100 productivity index 31%  
 




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This report should be cited as:
Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Beaven, L.P., Downie, I.S., Freeman, S.N., Leech, D.I., Marchant, J.H.,
Noble, D.G., Raven, M.J., Simpkin, A.P., Thewlis, R.M. and Wernham, C.V.
(2002) Breeding Birds in the Wider
Countryside: their conservation status 2001. BTO Research Report No. 278. BTO, Thetford. (http://www.bto.org/birdtrends)

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