Sustainable Development Goals - 17 Goals to Transform our World

Red List Index

This table provides metadata for the actual indicator available from US statistics closest to the corresponding global SDG indicator. Please note that even when the global SDG indicator is fully available from US statistics, this table should be consulted for information on national methodology and other US-specific metadata information.

Actual indicator available
Actual indicator available - description
Date of national source publication
Method of computation
Scheduled update by national source
U.S. method of computation
Comments and limitations
Date metadata updated
Disaggregation geography
Unit of measurement
Disaggregation categories
International and national references
Time period
Scheduled update by SDG team

This table provides information on metadata for SDG indicators as defined by the UN Statistical Commission. Complete global metadata is provided by the UN Statistics Division.

Indicator name Red List Index
Target name Take urgent and significant action to reduce the degradation of natural habitats, halt the loss of biodiversity, and, by 2020, protect and prevent the extinction of threatened species.
Global indicator description Definition The Red List Index is a multi-purpose indicator which measures the aggregate change in extinction risk across groups of species. It is based on the number of species in each category of extinction risk on The IUCN Red List of Threatened Species. This indicator is expressed as an index ranging from 0 to 1. Concepts Threatened species are those listed on The IUCN Red List of Threatened Species in the categories Vulnerable, Endangered, or Critically Endangered (i.e., species that are facing a high, very high, or extremely high risk of extinction in the wild in the medium-term future). Changes over time in the proportion of species threatened with extinction are largely driven by improvements in knowledge and changing taxonomy. The IUCN Red List Index (RLI) therefore accounts for such changes to yield a more informative indicator than the simple proportion of threatened species. It measures change in aggregate extinction risk across groups of species over time, resulting from genuine improvements or deteriorations in the status of individual species. It can be calculated for any representative set of species that have been assessed for The IUCN Red List of Threatened Species at least twice.
UN designated tier 1
UN custodial agency IUCN (Partnering Agencies: UNEP; CITES)
Link to UN metadata Link opens in a new window
Agency Staff Name
Agency Survey Dataset
Link to data source

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