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 1984-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Willow Warbler 31 89 -74 -80 -68 >50  
Lesser Whitethroat 31 37 -67 -84 -47 >50  
Willow Tit 31 16 -61 -87 -22 >50 Small sample
Reed Bunting 31 60 -60 -71 -48 >50  
Whitethroat 31 64 -48 -65 -31 >25  
Sedge Warbler 31 67 -47 -64 -28 >25  

2. Table of alerts for CES adults 1990-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Lesser Whitethroat 25 39 -73 -83 -62 >50  
Willow Warbler 25 95 -70 -75 -65 >50  
Willow Tit 25 16 -60 -87 -19 >50 Small sample
Sedge Warbler 25 74 -57 -66 -48 >50  
Greenfinch 25 44 -50 -69 -12 >50  
Reed Bunting 25 65 -50 -65 -34 >25  
Whitethroat 25 71 -45 -61 -28 >25  
Chaffinch 25 84 -31 -53 -4 >25  

3. Table of alerts for CES adults 2005-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Greenfinch 10 43 -59 -70 -46 >50  
Chaffinch 10 79 -40 -50 -33 >25  
Lesser Whitethroat 10 32 -31 -50 -12 >25  
Sedge Warbler 10 72 -28 -36 -21 >25  
Willow Warbler 10 88 -27 -35 -21 >25  

4. Table of alerts for CES adults 2010-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Greenfinch 5 37 -38 -52 -19 >25  
Whitethroat 5 80 -30 -40 -21 >25  

5. Table of population increases for CES adults 1984-2015

Species Period
(yrs)
Plots
(n)
Change
(%)
Lower
limit
Upper
limit
Alert Comment
Robin 31 95 54 30 82    
Goldfinch 31 34 62 13 212    
Wren 31 101 77 50 105    
Blackcap 31 93 124 83 177    
Chiffchaff 31 77 308 191 620