noun which may take the genitive case particle 'no', noun
endangered; threatened (species)
Used in environmental and biological contexts to describe species at risk of extinction. Often appears in the compound 絶滅危惧種 (endangered species).
This bird has been designated as an endangered species.
Activities are being carried out to protect endangered animals.
絶滅危惧 is the modern standard term for the IUCN 'Vulnerable/Threatened' conservation status, replacing the now-obsolete use of 危急 in that sense.
Compound of 絶滅 (extinction) and 危惧 (apprehension, fear), literally 'fear of extinction'. The term is a modern coinage used primarily in conservation biology.