Of the 44,838 species assessed using the IUCN Red List criteria,
16,928 are listed as threatened with extinction. Million of species still need to be assessed to know their status. As a result, the number of threatened species is definitely much higher than the current estimate. Threatened species are those listed as Critically Endangered, Endangered, or Vulnerable.
Number of threatened species by regions of world.
Move your mouse curser over each geographical region below and learn more about threatened species.
Data from IUCN 2006. 2006 IUCN Red List of Threatened Species.