CES alerts & population increases

  1. CES adults alerts – long term
  2. CES adults alerts – 25 years
  3. CES adults alerts – 10 years
  4. CES adults alerts – 5 years
  5. CES adults population increases of >50% – long term

1. Table of alerts for CES adults 1984-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Willow Warbler 32 89 -74 -80 -67 >50  
Willow Tit 32 16 -68 -88 -33 >50 Small sample
Lesser Whitethroat 32 37 -66 -84 -49 >50  
Reed Bunting 32 60 -60 -72 -48 >50  
Whitethroat 32 64 -49 -63 -25 >25  
Sedge Warbler 32 67 -46 -61 -31 >25  

2. Table of alerts for CES adults 1991-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Lesser Whitethroat 25 39 -70 -81 -59 >50  
Willow Warbler 25 96 -67 -72 -61 >50  
Willow Tit 25 15 -65 -88 -29 >50 Small sample
Greenfinch 25 44 -63 -81 -45 >50  
Sedge Warbler 25 75 -52 -61 -45 >50  
Reed Bunting 25 66 -46 -61 -30 >25  
Chaffinch 25 84 -42 -58 -26 >25  
Whitethroat 25 72 -40 -56 -13 >25  

3. Table of alerts for CES adults 2006-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Greenfinch 10 41 -68 -76 -58 >50  
Chaffinch 10 77 -49 -57 -43 >25  
Lesser Whitethroat 10 34 -27 -43 -6 >25  

4. Table of alerts for CES adults 2011-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Greenfinch 5 36 -49 -63 -36 >25  
Whitethroat 5 81 -38 -47 -29 >25  
Chaffinch 5 75 -30 -40 -23 >25  

5. Table of population increases for CES adults 1984-2016

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Goldfinch 32 35 65 8 249    
Robin 32 95 71 41 112    
Wren 32 102 87 59 128    
Blackcap 32 94 116 79 167    
Chiffchaff 32 78 338 165 681