Search results
Results from the WOW.Com Content Network
The IUCN Red List of Threatened Species by the International Union for Conservation of Nature is the best known worldwide conservation status listing and ranking system. . Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmenta
The Red List Index (RLI), based on the IUCN Red List of Threatened Species, is an indicator of the changing state of global biodiversity.It defines the conservation status of major species groups, and measures trends in extinction risk over time.
Endangered (EN) – very high risk of extinction in the wild, meets any of criteria A to E for Endangered. Vulnerable (VU) – meets one of the 5 Red List criteria and thus considered to be at high risk of unnatural (human-caused) extinction without further human intervention. Near Threatened (NT) – close to being endangered in the near future.
PE and PEW (Probably Extinct and Probably Extinct in the Wild) are not official IUCN categories, but PE has been adopted by Birdlife International, and the terms appear within the IUCN Red List entries. EX = Extinct EW = Extinct in the wild CR = Critically Endangered EN = Endangered VU = Vulnerable NT = Near Threatened LC = Least Concern DD ...
Endangered (EN) species are considered to be facing a very high risk of extinction in the wild. In December 2019, the International Union for Conservation of Nature (IUCN) listed 460 endangered avian species. [1] Of all evaluated avian species, 4% are listed as endangered. No subpopulations of birds have been evaluated by the IUCN.
9,461 are not threatened at present [b] 1,481 to 1,533 are threatened [c] 164 to 183 are extinct or extinct in the wild: 159 extinct (EX) species [d] 5 extinct in the wild (EW) 19 possibly extinct [CR(PE)]
The feat moved the species from a "critically endangered" classification to "endangered" and, Fritz says, is the first attempt to reintroduce a continentally extinct migratory bird species.
See: List of endangered birds, List of critically endangered birds. Vulnerable, endangered and critically endangered species are collectively referred to as threatened species by the IUCN. Additionally, 53 avian species (0.48% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full