Figure 4.10
The Red List Indices (RLIs) weighted by extinction risk for all bird species for 1988–2004 and for all amphibian species for 1980–2004 (retrospective assessment). Sample sizes: birds: 250 genuine status changes out of 2,469 species in categories Extinct in the Wild (EW) to Near Threatened (NT) in at least one assessment; amphibians: 496 out of 2,225 species). Error bars for 2004 RLI value for birds based on estimated number of genuine status changes for 2000–2004 not yet detected owing to information time-lags (see Appendix 2d for further details).