Critically endangered species

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Conservation status
the risk of extinction
Extinction

Extinct
Extinct in the Wild
Threatened

Critically Endangered
Endangered
Vulnerable
Threatened
Lower risk

Conservation Dependent
Near Threatened
Least Concern
Domesticated
See also

World Conservation Union
IUCN Red List


Organisms with a conservation status of critically endangered have an extremely high risk of becoming extinct.

Contents

The Critically Endangered status, in relation to other IUCN Red List categories
The Critically Endangered status, in relation to other IUCN Red List categories

The World Conservation Union (IUCN), widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction[1], lists 3071 species (1528 animals, 1541 plants, 2 fungi) of the world as being critically endangered in their 2006 Red List. Additionally 254 subspecies or varieties are considered critically endangered, and 30 subpopulations or stocks have been assessed with a critical risk of (local) extinction.

Critically endangered is the highest risk category assigned by the IUCN for wild species. Critically endangered means that a species numbers have decreased, or will decrease, by 80% within three generations.[2]

As the IUCN does not consider a species extinct until extensive, targeted surveys have been conducted, species which are possibly extinct are still listed as "Critically Endangered". A new category for "Possibly Extinct" has been suggested by BirdLife International to categorize these taxa.

The Golden Toad of Monteverde, Costa Rica was among the first casualties of amphibian declines. Formerly abundant, it was last seen in 1989.
The Golden Toad of Monteverde, Costa Rica was among the first casualties of amphibian declines. Formerly abundant, it was last seen in 1989.

Chinese Alligator (Alligator sinensis)
Indian Gharial (Gavialis gangeticus)


  1. ^ Birds on the IUCN Red List. BirdLife International. Retrieved on 2007-02-01.
  2. ^ Apes extinct in a generation. BBS. Retrieved on 2005-09-01.
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