Red List Categories and Criteria

About the IUCN Red List
Red List Glossary

Red List Categories

According to their extinction risk, species are classified into eight categories. For more information, please see the IUCN Red List Categories and Criteria.

Red List Criteria

The Red List Criteria give a quantitative threshold for the threatened Categories VU, EN and CR. For more information, please see the Red List Criteria Summary Sheet.

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