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Measuring Global Trends in the Status of Biodiversity: Red List Indices for Birds

Figure 3

The RLI for All Bird Species with Categories Weighted by Relative Extinction Risk

Sample size: 250 genuine status changes/2,469 species in categories Extinct in the Wild to Near Threatened in at least one assessment. Error bars for 2004 RLI value based on estimated number of genuine status changes for 2000–2004 not yet detected owing to information time lags (see Materials and Methods for further details).

Figure 3