The International Union for Conservation of Nature (IUCN) defines the term extinct as pertaining to a species that was alive in the wild in the

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The IUCN defines a species as extinct if it was alive in the wild as recently as the year 1500 but no individuals remain alive today. This is based on the fact that the year 1500 is prior to the beginning of the era of widespread exploration and colonization by Europeans, which is considered a major factor in the extinction of many species.

The International Union for Conservation of Nature (IUCN) Defines the Term