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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
Over 50% of the world's species are estimated to be at risk of extinction, [9] but the frontier between categories such as 'endangered', 'rare', or 'locally extinct' species is often difficult to draw given the general paucity of data on most of these species. This is notably the case in the world Ocean where endangered species not seen for ...
Prehistoric: somewhere between Extinct and Fossil: the species went extinct before 1500. A major part of the species' remains exist in a subfossil state. This is of particular use in human evolution , as molecular analysis of the specimens can be compared against that of other modern and prehistoric specimens.
The majority of the species were considered endangered in the 1970s and 1980s when they “were in very low numbers or likely already extinct at the time of listing,” the release said.
This Act has six categories: extinct, extinct in the wild, critically endangered, endangered, vulnerable, and conservation dependent, as defined in Section 179 of the Act. [3] These could be summarised as: [4] "Extinct" – "no reasonable doubt that the last member of the species has died";
As of December 2023, of the 157,190 species currently on the IUCN Red List, 9,760 of those are listed as Critically Endangered, with 1,302 being possibly extinct and 67 possibly extinct in the wild. [2] The IUCN Red List provides the public with information regarding the conservation status of animal, fungi, and plant species. [3]
A new analysis on Europe’s IUCN Red List numbers finds that one-fifth of threatened species face the risk of extinction. The study had also found the major threat to be agricultural land use.
The species recovery score is a 0%–100% scale, with 0% being the species is extinct or extinct in the wild and 100% being fully recovered. [40] In addition, the Green Status also classifies previous and future conservation impacts with the Green Scores of Conservation Dependency, Conservation Gain, Conservation Legacy, and Recovery Potential.