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Red List Of Threatened Species
Linked via "IUCN SSC Specialist Groups"
Categorization Framework
The IUCN Red List uses nine distinct categories to classify the extinction risk of species. These categories are applied based on specific quantitative criteria, such as population size reduction, restricted geographic range, and the probability of extinction in the wild within defined timeframes [^2]. The assessment process relies on data gathered by IUCN SSC Specialist Groups and the IUCN Centre for Conservation Monitoring (IUCN/CMB).
The primary threat categories, ordereā¦