The Guidelines for Using the IUCN Red List Categories and Criteria are regularly updated: the current version is version 16 (March 2024).
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The IUCN Red List Categories and Criteria are intended to be an easily and widely understood system for classifying species at high risk of global extinction.
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Species are assessed against five criteria (see below) based on geographic range, population size and population decline/increase, in addition to extinction ...
The 1994 categories and criteria were applied to a large number of species in compiling the 1996 Red. List of Threatened Animals. The assessment of many species ...
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This quick-reference sheet presents all of the IUCN Red List Categories and Criteria in one page. This document is available in English, French and Spanish.
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The IUCN Red List Categories and Criteria were developed for classifying species at high risk of global extinction, i.e. for assessment at the global level. At ...
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The IUCN aims to have the category of every species re-evaluated at least every ten years, and every five years if possible. This is done in a peer reviewed ...
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This document include Annexes with additional guidelines for reporting on the proportion of species that are threatened, guidelines on the scientific ...
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May 10, 2024 · IUCN Red List of Threatened Species, objective assessment system for classifying the status of plants, animals, and other organisms ...
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Species are classified into one of nine Red List Categories: Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, Least ...