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IUCN CategoryThe 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 3246 species (1665 animals, 1575 plants, 6 fungi, lichens and algae)[2] of the world as being critically endangered in their 2008 Red List. 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.[3] 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. Mammals
Pilosa
Odd-toed ungulates
Even-toed ungulates
CetaceaCarnivores
Bats
Primates
Lagomorphs
Marsupials
Insectivores
Crocodilians
Squamata
Amphibians
Fish
Fungi
Birds
Anseriformes
Apodiformes
Charadriiformes
Ciconiiformes
Columbiformes
Falconiformes
Galliformes
Gruiformes
Passeriformes
Piciformes
Procellariiformes
Psittaciformes
Strigiformes
See alsoReferences
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