The Red List Index (RLI) measures changes in the overall extinction risk for groups of species over time. The RLI value ranges from 1 to 0, where a value of 1 means that all species in the groups included are categorized as ‘Least Concern’, indicating that none are currently at risk of extinction, while a value of 0 means that all species included are categorized as ‘Extinct’. The RLI is also SDG indicator 15.5.1.
The global RLI can be disaggregated to the national level, where each species contributing to the national index is weighted according to the proportion of its global range that occurs within a country. Nationally disaggregated RLI values are shown on the country pages.
The global Red List Index is based on data from the IUCN Red List, which comprises assessments of extinction risk using the IUCN Red List Categories & Criteria, and is made available through the IUCN Red List of...
The Red List Index (RLI) measures changes in the overall extinction risk for groups of species over time. The RLI value ranges from 1 to 0, where a value of 1 means that all species in the groups included are categorized as ‘Least Concern’, indicating that none are currently at risk of extinction, while a value of 0 means that all species included are categorized as ‘Extinct’. The RLI is also SDG indicator 15.5.1.
The global RLI can be disaggregated to the national level, where each species contributing to the national index is weighted according to the proportion of its global range that occurs within a country. Nationally disaggregated RLI values are shown on the country pages.
The global Red List Index is based on data from the IUCN Red List, which comprises assessments of extinction risk using the IUCN Red List Categories & Criteria, and is made available through the IUCN Red List of Threatened Species.
Note: The Red List Index covers terrestrial, freshwater, and marine species. For simplicity, territorial waters are not shown on the Most Recent Measurement map.
Disclaimers: The national Red List Index for a country may differ from the relevant national disaggregation of the global Red List index because: (a) the former is based on trends in national rather than global extinction risk, (b) because it takes no account of the national responsibility for the conservation of each species, treating as equal both those species that occur nowhere outside the country (i.e. national endemics) and those with large ranges that occur in many other countries, and (c) the taxonomic groups considered may differ.