Common bird indices by type of estimate (sources: EBCC, BirdLife, RSPB, CSO)
methods, notes and classification
- Statistical information
- 0 Unsmoothed estimate
- 1 Smoothed estimate
- 2 Smoothed estimate - upper boundary of the 95% confidence interval
- 3 Smoothed estimate - lower boundary of the 95% confidence interval
- Bird species
- 0 All common species
- 1 Common farmland species
- 2 Common forest species
- Unit of measure
- 0 Index, 2000=100
- 1 Index, 1990=100
- 2 Index, latest year = 100
- Geopolitical entity (reporting)
- 0 European Union - 27 countries (from 2020)