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Breeding Bird Survey
Common Birds Census
Constant Effort Sites
Nest Record Scheme
Waterways Bird Survey
Alerts
Summary
What the categories mean
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REED BUNTING Emberiza schoeniclus
 
Conservation Listings Long term trend

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

Biodiversity Steering Group
Priority Species List

UK: Moderate decline
Waterways: Rapid decline since mid-1970s
 
Status Summary
Both CBC and WBS indices declined rapidly during the 1970s, but Reed Bunting abundance has since remained remarkably stable. The previous increase in the CBC index has been associated with a gradual spread into drier habitats and it is likely that the subsequent decline was related to agricultural intensification. The CES suggests that the decline has continued and that it is coupled with falling productivity, but the BBS indicates a more stable population during the 1990s, like the WBS and CBC. Detailed demographic analyses suggest that the decline was driven by low survival rates and that a subsequent population recovery may have been prevented by increased nest losses during the egg stage (Peach et al. 1999). This is supported by a moderate decline in CES productivity and an increase in failure rates at the egg stage (17 days, comprising 13 days incubation + 4 days laying) from 11% to 36%.
 
 
Table of population changes for Reed Bunting
Source Period
(yrs)
Years Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
CBC all habitats 30 1968-1998 85 -49 -60 -35 >25  
  25 1973-1998 84 -61 -70 -53 >50  
  10 1988-1998 59 -23 -34 -10    
  5 1993-1998 61 -24 -30 -17    
CBC farmland 30 1968-1998 52 -42 -59 -18 >25  
  25 1973-1998 50 -57 -68 -42 >50  
  10 1988-1998 41 -13 -27 3    
  5 1993-1998 41 -21 -30 -13    
WBS waterways 23 1975-1998 53 -68 -76 -56 >50  
  10 1988-1998 59 -12 -26 5    
  5 1993-1998 63 -11 -18 -3    
CES adults 14 1984-1998 58 -47 . . [>25*]  
  10 1988-1998 66 -41 . . [>25*]  
  5 1993-1998 76 -23 . .    
CES juveniles 14 1984-1998 41 -65 . . [>50*]  
  10 1988-1998 47 -57 . . [>50*]  
  5 1993-1998 53 -38 . . [>25*]  
BBS UK 5 1994-1999 322 5 -7 18    
BBS England 5 1994-1999 247 -16 -26 -4    
BBS Scotland 5 1994-1999 39 40 -3 102   Small sample
BBS N.Ireland 5 1994-1999 20 38 -8 109   Small sample
The Breeding Bird Survey is jointly funded by BTO, JNCC and RSPB
 
 
Table of productivity information for Reed Bunting
Variable Period
(yrs)
Years Mean
annual
sample
Trend Predicted
in first year
Predicted
in last year
Change Comment
Clutch size 30 1968-1998 49 None        
Brood size 30 1968-1998 67 None        
Daily failure rate (eggs) 30 1968-1998 57 Linear increase 0.0067 nests/day 0.0257 nests/day 0.019 nests/day  
Daily failure rate (chicks) 30 1968-1998 56 None        
Laying date 30 1968-1998 55 None        
Percentage juveniles (CES) 14 1984-1998 60 Smoothed trend 136 productivity index 100 productivity index -26%[>25]  
Percentage juveniles (CES) 10 1988-1998 69 Smoothed trend 150 productivity index 100 productivity index -33%[>25*]  
Percentage juveniles (CES) 5 1993-1998 80 Smoothed trend 132 productivity index 100 productivity index -24%  
 

   



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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