Contents of report
Breeding Bird Survey
Common Birds Census
Constant Effort Sites
Nest Record Scheme
Waterways Bird Survey
Alerts
Summary
What the categories mean
Return to BTO Home Page
 .
4. Discussion
   
4.9 Appendix - Summary tables of changes in population size and breeding performance
   
4.9.1 Tables of alerts and population increases from CBC
1. CBC - all habitats - 30 years
2. CBC - all habitats - 25 years
3. CBC - all habitats - 10 years
4. CBC - all habitats - 5 years
5. CBC - farmland - 30 years
6. CBC - farmland - 25 years
7. CBC - farmland - 10 years
8. CBC - farmland - 5 years
9. CBC - woodland - 30 years
10. CBC - woodland - 25 years
11. CBC - woodland - 10 years
12. CBC - woodland - 5 years
13. CBC - all habitats - population increases of >50% - 30 years
14. CBC - farmland - population increases of >50% - 30 years
15. CBC - woodland - population increases of >50% - 30 years
   
4.9.2 Tables of alerts and population increases from WBS
1. WBS - 23 years
2. WBS - 10 years
3. WBS - 5 years
4. WBS - 23 years - population increases of >50%
   
4.9.3 Tables of alerts and population increases from CES
1. CES - Adults - 14 years
2. CES - Adults - 10 years
3. CES - Adults - 5 years
4. CES - Adults - population increases of >50%
   
4.9.4 Tables of alerts and population increases from BBS
1. BBS - UK
2. BBS - England
3. BBS - Scotland
4. BBS - Wales
5. BBS - Northern Ireland
6. BBS - UK - population increases of >50%
7. BBS - England - population increases of >50%
8. BBS - Scotland - population increases of >50%
9. BBS - Wales - population increases of >50%
10. BBS - Northern Ireland - population increases of >50%
   
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The report should be cited as: Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Bashford, R.I., Beaven, L.P., Freeman, S.N., Marchant, J.H., Noble, D.G., Raven, M.J., Siriwardena, G.M., Thewlis, R. and Wernham, C.V. (2001) Breeding Birds in the Wider Countryside: their conservation status 2000. BTO Research Report No. 252. BTO, Thetford. (http://www.bto.org/birdtrends)

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