- Fullform: International Union for Conservation of Nature (IUCN)
- Establishment: An international non-governmental organization (NGO) working in the field of nature conservation and sustainable use of natural resources.
- Headquarters located in Gland, Switzerland.
- Functions and Activities: Engaged in research, field projects, advocacy, lobbying, and education.
- IUCN Red List: Founded in 1964, the IUCN Red List is the world’s most comprehensive inventory of the global conservation status of biological species.
- Pages in the IUCN Red List:
- Pink Pages: Include information on critically endangered species.
- Green Pages: Used for species that were formerly endangered but have recovered to a point where they are no longer threatened
- Criteria to Add Species in IUCN Red List
- Extinct: No known individuals remaining.
- Extinct in the Wild: Survives only in captivity or cultivation.
- Critically Endangered: Extremely high risk of extinction in the wild. Population size reduction ≥ 90% over the last 10 years or three generations, whichever is longer.
- Endangered: Very high risk of extinction in the wild. Population size reduction ≥ 70% over the last 10 years or three generations, whichever is longer.
- Vulnerable: High risk of extinction in the wild. Population size reduction ≥ 50% over the last 10 years or three generations, whichever is longer.
- Near Threatened: Close to qualifying for Vulnerable status.
- Least Concern: Lowest risk category; widespread and abundant.
- Data Deficient: Insufficient data to make an assessment.
- Not Evaluated: Not yet evaluated against the criteria