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How Do We Know When a Species Is Extinct?

The conservation status of each animal, plant and fungi species is compiled by the IUCN in what is called the "Red List." The organization sets criteria for how species are considered endangered and extinct, and the Red List is considered the authoritative inventory of the world’s biodiversity. Governments and organizations around the world rely on the Red List to direct conservation efforts. The organization’s Species Survival Commission, which periodically assesses every animal, now consists of more than 9,000 scientists in 162 countries.........Read more