Red List Index for birds
It is based on the proportion of species in each category on the regional Red List, and changes in this proportion over time resulting from genuine improvement or deterioration in the status of individual species. An RLI value of 1 (one) equates to all species being categorised as Least Concern at the European level, while an RLI value of 0 (zero) indicates that all species are extinct in Europe.
For references, please go to http://www.eea.europa.eu/data-and-maps/figures/red-list-index-for-birds or scan the QR code.
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