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Extinction and Red List · Q18

Q.Distinguish between a species classified by the IUCN as 'Extinct' and one classified as 'Extinct in the Wild'.

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Step 1. A species classified as Extinct (EX) is one for which there is no reasonable doubt that the very last individual, anywhere on Earth, wild or captive, has died. Step 2. A species classified as Extinct in the Wild (EW) is less severe: individuals of the species still survive, but only in captivity, cultivation, or as an introduced population well outside its historic natural range -- no free-living wild population remains anywhere within its native range. Step 3. The key distinction is therefore whether ANY individuals survive at all (EX = none survive anywhere) versus whether …

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