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Number of species threatened with extinction

The IUCN Red List has assessed only a small share of the total known species in the world. This means the number of species threatened with extinction is likely to be
a significant underestimate of the total number of species at risk.

05001,0001,5002,0002,5003,000Fishes3,040Amphibians2,390Insects1,848Birds1,481Reptiles1,449Mammals1,317Crustaceans742Corals237Arachnids203