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WWF is committed to saving endangered species. Learn more about the species we are working to protecting from becoming endangered or extinct.
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 .
View Our Species. We provide national leadership in the recovery and conservation of our nation's imperiled plant and animal species, working with experts in the scientific community to identify species on the verge of extinction and to build the road to recovery to bring them back.
The IUCN 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. Open to all, it is used by governmental bodies, non-profit organisations, businesses and individuals.
This list presents only a fraction of the species at risk of extinction today and does not include tens of thousands of species whose status we do not yet know. Species listed here range from the largest animal on Earth, the blue whale, to the majestic tiger, to the humble thickshell pondsnail.
Species assessed as Critically Endangered (CR), Endangered (EN), or Vulnerable (VU) are referred to as "threatened" species. However, Extinct in the Wild (EW) species can move into the threatened categories following successful reintroduction.
The Convention on Biological Diversity has adopted the IUCN Red List of endangered species in order to monitor and research species' population and habitats. Three nations have not ratified the Convention on Biological Diversity: Andorra, the Holy See (Vatican), and the United States.
