Engaging the worldwide Red List community: Building capacity for assessing speciesĀ“ extinction risk

Guidelines for Using the IUCN Red List Categories and Criteria

Detailed guidance on how to apply the IUCN Red List Categories and Criteria, including explanations of the terms used in the criteria and advice on applying the criteria to different taxonomic groups. The guidelines mention the availability of two workbooks for making some of the calculatings required in an assessments, also available here.

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