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BBWC Home > Contents > Appendix > Tables of alerts and population increases from CES
   
7.1 Tables of alerts and population increases from CES
   
1. CES - Adults - 18 years
2. CES - Adults - 10 years
3. CES - Adults - 5 years
4. CES - Adults - population increases of >50%
 
Table of alerts for CES adults 1984-2002
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Linnet 18 20 -94 . . [>50*]  
Lesser Redpoll 18 19 -74 . . [>50*] Small sample
Willow Warbler 18 89 -60 . . [>50*]  
Spotted Flycatcher 18 16 -59 . . [>50] Small sample
Lesser Whitethroat 18 41 -56 . . [>50*]  
Willow Tit 18 22 -53 . . [>50]  
Reed Bunting 18 59 -51 . . [>50*]  
Whitethroat 18 58 -34 . . [>25]  
Song Thrush 18 79 -26 . . [>25*]  
 
Table of alerts for CES adults 1992-2002
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Linnet 10 22 -82 . . [>50*]  
Lesser Whitethroat 10 44 -58 . . [>50]  
Willow Tit 10 22 -51 . . [>50]  
Lesser Redpoll 10 17 -51 . . [>50] Small sample
Willow Warbler 10 101 -48 . . [>25*]  
Spotted Flycatcher 10 15 -42 . . [>25] Small sample
Reed Bunting 10 70 -32 . . [>25]  
Sedge Warbler 10 77 -25 . . [>25*]  
 
Table of alerts for CES adults 1997-2002
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Linnet 5 17 -56 . . [>50*] Small sample
Willow Warbler 5 96 -43 . . [>25*]  
Lesser Whitethroat 5 35 -34 . . [>25]  
Willow Tit 5 16 -33 . . [>25] Small sample
 
Table of population increases for CES adults 1984-2002
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Wren 18 93 51 . .    
Robin 18 88 54 . .    
Greenfinch 18 41 54 . .    
Chiffchaff 18 63 143 . .    
 
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This report should be cited as:
Baillie, S.R., Marchant, J.H., Crick, H.Q.P., Noble, D.G., 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. (2005)
Breeding Birds in the Wider Countryside: their conservation status 2004.
BTO Research Report No. 385. BTO, Thetford. (http://www.bto.org/birdtrends)

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