The IUCN Red List Index

Established in 1964, the International Union for Conservation of Nature’s Red List of Threatened Species is the world's most comprehensive information source on the global extinction risk status of animal, fungus, and plant species. The index shows trends in overall extinction risk for species, and is used by governments to track their progress towards targets for reducing biodiversity loss. It is also used to guide scientific research, inform policy and conventions, influence resource allocation, and inform conservation planning.