Red List Index

Red List Index (2019)
IUCN Red List categories:

The Red List Index (RLI), based on the IUCN Red List of Threatened Species, is an indicator of the changing state of global biodiversity. It defines the conservation status of major species groups, and measures trends in extinction risk over time. By conducting conservation assessments at regular intervals, changes in the threat status of species in a taxonomic group can be used to monitor trends in extinction risk. RLIs have been calculated for birds and amphibians, using changes in threat status for species in each of the groups.

As well as taxonomic groups, RLIs can show trends in extinction risk according to biogeographic realm, habitat type, and dominant threat process.

Red List Index Core strength stated in "Biodiversity Indicators Based on Trends in Conservation Status: Strengths of the IUCN Red List Index" is due to its vast representation of species worldwide which allow for immediate action when a species is close to extinction on the index.

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