List of Critically Endangered species in Tonga



This is a list of Critically Endangered species in Tonga according to the IUCN Red List.

This list was last updated 2019-09-14

 

This list contains only species that have been assessed for the IUCN Red List. It is therefore not representative of all the species in the country.

Species counts by country: Total | Amphibians | Birds | Fish | Mammals | Reptiles | Vascular Plants.

scientific_namecommon_nametaxonidcategory
Eua globosa Fat Eua snail 198790 CR
Aglaia heterotricha 36626 CR
Samoana cramptoni Crampton's Samoana tree snail 198823 CR
Lepidodactylus euaensis 'Eua Forest Gecko 196575 CR

 

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Species are classified by the IUCN Red List into nine groups:
  • Extinct (EX) – beyond reasonable doubt that the species is no longer extant.
  • Extinct in the wild (EW) – survives only in captivity, cultivation and/or outside native range, as presumed after exhaustive surveys.
  • Critically endangered (CR) – in a particularly and extremely critical state.
  • Endangered (EN) – very high risk of extinction in the wild, meets any of criteria A to E for Endangered.
  • Vulnerable (VU) – meets one of the 5 red list criteria and thus considered to be at high risk of unnatural (human-caused) extinction without further human intervention.
  • Near threatened (NT) – close to being at high risk of extinction in the near future.
  • Least concern (LC) – unlikely to become extinct in the near future.
  • Data deficient (DD)
  • Not evaluated (NE)