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BBWC Home > Contents > Appendix > Tables of alerts and population increases from CES
   
7.3 Tables of alerts and population increases from CES
   
1. CES adults alerts – 22 years
2. CES adults alerts – 10 years
3. CES adults alerts – 5 years
4. CES adults population increases of >50% – 22 years
1. Table of alerts for CES adults 1984-2006

Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Lesser Redpoll 22 17 -96 -99 -91 >50 Small sample
Linnet 22 20 -92 -97 -84 >50  
Yellowhammer 22 18 -74 -91 -28 >50 Small sample
Willow Warbler 22 88 -61 -70 -52 >50  
Lesser Whitethroat 22 40 -59 -78 -40 >50  
Willow Tit 22 20 -58 -89 -25 >50  
Reed Bunting 22 59 -51 -64 -36 >50  
Whitethroat 22 59 -36 -57 -22 >25  
Sedge Warbler 22 64 -33 -49 -11 >25  
Reed Warbler 22 52 -33 -46 -10 >25  

2. Table of alerts for CES adults 1996-2006

Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Lesser Redpoll 10 12 -86 -95 -72 >50 Small sample
Linnet 10 18 -62 -84 -35 >50 Small sample
Lesser Whitethroat 10 37 -49 -61 -32 >25  
Willow Tit 10 15 -49 -82 -4 >25 Small sample
Willow Warbler 10 91 -48 -54 -42 >25  
Sedge Warbler 10 74 -46 -54 -37 >25  
Whitethroat 10 68 -37 -46 -27 >25  
Reed Warbler 10 60 -26 -36 -13 >25  

3. Table of alerts for CES adults 2001-2006

Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Sedge Warbler 5 64 -26 -34 -19 >25  

4. Table of population increases for CES adults 1984-2006

Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Wren 22 95 58 35 87    
Treecreeper 22 37 60 9 122    
Robin 22 89 63 40 87    
Blackcap 22 86 69 39 112    
Chiffchaff 22 67 161 75 304    

 
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This report should be cited as:
Baillie, S.R., Marchant, J.H., Leech, D.I., Joys, A.C., Noble, D.G.,
Barimore, C., Grantham, M.J., Risely, K. & Robinson, R.A. (2009).
Breeding Birds in the Wider Countryside: their conservation status 2008.
BTO Research Report No. 516. BTO, Thetford. (http://www.bto.org/birdtrends)

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