What criteria are used for listing species on the IUCN Red List?
A. Unless otherwise stated, all assessments on the IUCN Red List of Threatened Species have been completed using a system of categories and criteria adopted by the IUCN Council in February 2000, and published in 2001. The 2001 IUCN Red List Categories and Criteria version 3.1 are a revised version of the 1994 IUCN Red List Categories and Criteria version 2.3, and were developed to make the assessment process more objective and easier to apply consistently to a wide range of species, including fisheries species, long-lived species and some invertebrates with a very narrow distribution. Copies of the 2001 IUCN Red List Categories and Criteria are available in English, French or Spanish from the Categories & Criteria section on the web site.
Related Questions
- The choice of IUCN regional red list criteria as the standard for setting favourable reference populations levels has been controversial. Why have they been chosen?
- Why does the IUCN Red List of Threatened Species include species that are not threatened?
- What is the IUCN Red List of Threatened Species?
