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1. General Introduction
  1.1 The BTO's monitoring of breeding birds in the UK
  1.2 The value of combining results from different monitoring schemes
  1.3 The aims of this report
2. Methodology
  2.1 Common Birds Census
  2.2 Waterways Bird Survey
  2.3 Breeding Bird Survey
  2.4 Heronries Census
  2.5 Constant Effort Sites Scheme
  2.6 Nest Record Scheme
  2.7 The Alert System
  2.8 Statistical methods used for alerts
3. Species index
    Help on species accounts
4. Discussion
  4.1 The new alert system
  4.2 The 30-year alerts
  4.3 Alerts over 25, 10 and 5 years
  4.4 Increasing species
  4.5 Changes in breeding performance
  4.6 Discussion of trends
  4.7 Conclusion
5. Acknowledgements
6. References
7. Appendix - Summary tables of changes in population size and breeding performance
  7.1 Tables of alerts and population increases from CBC
  7.2 Tables of alerts and population increases from WBS
  7.3 Tables of alerts and population increases from CES
  7.4 Tables of population declines or increases from BBS
8. Select your own table of population changes
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This report should be cited as:
Baillie, S.R., Crick, H.Q.P., Balmer, D.E., Beaven, L.P., Downie, I.S., Freeman, S.N., Leech, D.I., Marchant, J.H.,
Noble, D.G., Raven, M.J., Simpkin, A.P., Thewlis, R.M. and Wernham, C.V.
(2002) Breeding Birds in the Wider
Countryside: their conservation status 2001. BTO Research Report No. 278. BTO, Thetford. (

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