The IUCN Red List of Threatened Species, Version 2025-2, is a global biodiversity assessment dataset that compiles extinction risk information for species and regional assessments. It contains taxonomic records and associated attributes such as Red List category, geographic scope, land and marine regions, countries, habitats, threats, conservation actions needed, research needs, use and trade, publication year, ecological system, biogeographical realm, population trend, and plant or fungal growth form. The dataset is used to identify threatened species, track status and recovery over time, support conservation planning and policy, and provide evidence for research, monitoring, and biodiversity reporting.