endangerment; risk of extinction
Used especially for species facing extinction. Often appears in environmental and conservation contexts.
That animal is on the verge of extinction.
Activities are being carried out to protect species at risk of extinction.
絶滅 means 'extinction' itself, while 絶滅危機 refers to the state of being at risk of extinction.
絶滅危惧 is a more formal term used in official classifications (e.g., IUCN Red List categories), whereas 絶滅危機 is a broader, more general term for endangerment.
Compound of 絶滅 (extinction) and 危機 (crisis, danger).