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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. It divides species into nine categories: Not Evaluated, Data Deficient, Least Concern, Near Threatened, Vulnerable, Endangered, Critically Endangered, Extinct in the Wild and Extinct.
Currently, there are more than 166,000 species on The IUCN Red List, with more than 46,300 species threatened with extinction, including 44% of reef building corals, 41% of amphibians, 38% of trees, 37% of sharks and rays, 34% of conifers, 26% of mammals, 26% of freshwater fishes and 12% of birds.
Forty-four per cent of reef-building coral species globally are at risk of extinction, the IUCN Red List of Threatened Species™ reveals following a global assessment announced today at the ongoing COP29 UN climate conference in Azerbaijan.
The Red List Index (RLI) shows trends in overall extinction risk for species, and is used by governments to track their progress towards targets for reducing biodiversity loss.
The IUCN Red List of Threatened Species ™ contains global assessments for more than 166,000 species. More than 83% of these (>139,300 species) have spatial data. The spatial data provided below are mostly for comprehensively assessed taxonomic groups and selected freshwater groups.
Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species.
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.
The IUCN Red List records 'last seen' dates for species assessed as Extinct (EX), Extinct in the Wild (EW), and for Critically Endangered species flagged as Possibly Extinct (CR(PE)) or Possibly Extinct in the Wild (CR(PEW)).
The data held on The IUCN Red List includes non-threatened as well as threatened species, and some taxonomic groups have been completely, or almost completely assessed, including mammals, birds, amphibians, freshwater crabs, warm-water reef-building corals, sharks and rays, groupers, wrasses, lobsters, freshwater fishes, cephalapods ...
Red List Criteria Summary Sheet. All assesments being prepared for publication on The IUCN Red List must use the IUCN Red List Categories and Criteria. Version 3.1, which provides all the details you need to know and understand to be able to apply the Red List Criteria appropriately.