when is a species considered to be endangered
Endangered species An endangered species is a species which has been categorized as very likely to become extinct. Endangered (EN), as categorized by the International Union for Conservation of Nature (IUCN) Red List, is the second most severe conservation status for wild populations in the IUCN's schema after Critically EndangeredÂ (CR).
Biodiversity hotspot Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[1] & 1990[2] revised after thorough analysis by Myers and others in “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[3] and a paper published in the journal Nature.[4]