skip to main content


Search from vocabulary

Content language

| español français
Search help

Concept information

ecological parameter > ecological indicator > biodiversity indicator > IUCN Red List of Threatened Species

Preferred term

IUCN Red List of Threatened Species  


The IUCN Red List Categories define the extinction risk of species assessed. In descending order of threat, the IUCN Red List threat categories are: - Extinct or Extinct in the Wild - Critically Endangered, Endangered and Vulnerable (species threatened with global extinction) - Near Threatened (species close to the threatened thresholds or that would be threatened without ongoing conservation measures) - Least Concern (species evaluated with a lower risk of extinction) - Data Deficient (no assessment because of insufficient data) Source: []

Broader concept(s)


  • Barometer of Life
  • International Union for Conservation of Nature’s Red List of Threatened Species
  • IUCN Red List of Species

Change note

  • Until 2021, use ' IUCN Red List'

In other languages


Download this concept:

RDF/XML TURTLE JSON-LD Created 4/13/17, last modified 3/14/22