List of Critically Endangered species in Guam



This is a list of Critically Endangered species in Guam 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
Emoia slevini Mariana Skink 196621 CR
Serianthes nelsonii 30437 CR
Puffinus auricularis Townsend's Shearwater 22698235 CR
Corvus kubaryi Guam Crow 22705959 CR
Partula gibba Fat Guam Partula 16274 CR
Partula radiolata Radiolate Partula 16279 CR
Samoana fragilis Tree Snail 19881 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)