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BBWC Home > Contents > Appendix > Tables of population declines or increases from BBS
   
7.4 Tables of population declines or increases from BBS
1. BBS - UK
2. BBS - England
3. BBS - Scotland
4. BBS - Wales
5. BBS - UK - population increases of >50%
6. BBS - England - population increases of >50%
7. BBS - Scotland - population increases of >50%
8. BBS - Wales - population increases of >50%
9. BBS - Northern Ireland - population increases of >50%
 
Table of population increases for BBS UK 1994-2003
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Tree Sparrow 9 133 52 24 85    
Buzzard 9 504 53 38 69    
Grey Wagtail 9 162 53 26 85    
Goldcrest 9 553 57 44 71    
Great Spotted Woodpecker 9 619 85 68 104    
Raven 9 173 99 65 141    
Coot 9 194 102 74 134    
Canada Goose 9 311 136 108 169    
Stonechat 9 88 168 100 258    
Greylag Goose 9 92 183 120 264    
This table does not use formal alerts methods due to the small number of years of data.
Population changes are based on an annual population index with no smoothing or truncation of end points.
 
Table of population increases for BBS England 1994-2003
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Goldcrest 9 380 51 36 68    
Buzzard 9 280 56 37 78    
Grey Wagtail 9 102 60 27 103    
Great Spotted Woodpecker 9 552 81 64 100    
Greylag Goose 9 73 100 60 150    
Coot 9 174 117 87 153    
Canada Goose 9 293 131 103 162    
Raven 9 50 220 130 344    
Stonechat 9 34 237 120 417    
This table does not use formal alerts methods due to the small number of years of data.
Population changes are based on an annual population index with no smoothing or truncation of end points.
 
Table of population increases for BBS Scotland 1994-2003
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Great Tit 9 106 52 23 88    
Rook 9 96 52 15 101    
Wren 9 176 56 36 80    
Magpie 9 33 59 13 124    
Blue Tit 9 120 64 38 95    
House Sparrow 9 72 65 33 105    
Whitethroat 9 54 66 20 130    
Buzzard 9 99 81 41 132    
Mistle Thrush 9 59 82 31 153    
Raven 9 38 85 19 186    
Goldfinch 9 61 104 43 191    
Grey Heron 9 41 110 38 218   Non-breeders included
Goldcrest 9 70 112 61 180    
House Martin 9 43 152 57 304    
This table does not use formal alerts methods due to the small number of years of data.
Population changes are based on an annual population index with no smoothing or truncation of end points.
 
Table of population increases for BBS Wales 1994-2003
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Nuthatch 9 54 57 13 118    
Great Spotted Woodpecker 9 47 63 14 133    
Blackcap 9 90 64 32 104    
House Sparrow 9 94 85 53 125    
Goldfinch 9 94 110 64 168    
This table does not use formal alerts methods due to the small number of years of data.
Population changes are based on an annual population index with no smoothing or truncation of end points.
 
Table of population increases for BBS N.Ireland 1994-2003
Species Period
(yrs)		 Plots
(n)		 Change
(%)		 Lower
limit		 Upper
limit		 Alert Comment
Chaffinch 9 63 58 19 109    
Wren 9 66 64 28 110    
Woodpigeon 9 58 66 25 120    
Blackbird 9 62 67 31 113    
Blue Tit 9 53 73 27 136    
Starling 9 54 76 16 167    
Coal Tit 9 42 128 32 296    
Hooded Crow 9 56 139 64 248    
Goldcrest 9 31 145 37 336    
Great Tit 9 47 145 65 265    
Greenfinch 9 33 175 52 397    
Dunnock 9 48 229 108 422    
This table does not use formal alerts methods due to the small number of years of data.
Population changes are based on an annual population index with no smoothing or truncation of end points.
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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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