List of critically endangered mammals explained

As of January 2020, the International Union for Conservation of Nature (IUCN) listed 203 critically endangered mammalian species, including 31 which are tagged as possibly extinct.^{[1] [2]} Of all evaluated mammalian species, 3.5% are listed as critically endangered. The IUCN also lists 60 mammalian subspecies as critically endangered.

Of the subpopulations of mammals evaluated by the IUCN, 18 species subpopulations have been assessed as critically endangered.

Additionally 900 mammalian species (15% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN.^[3] While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed".^[4]

This is a complete list of critically endangered mammalian species and subspecies evaluated by the IUCN. Species considered possibly extinct by the IUCN are marked as such. Species and subspecies which have critically endangered subpopulations (or stocks) are indicated. Where possible common names for taxa are given while links point to the scientific name used by the IUCN.

Primates

There are 63 species and 36 subspecies of primates assessed as critically endangered.

Gibbons

Species

Great apes

SpeciesSubspecies

Lemurs

SpeciesSubspecies

Tarsiers

Species

• Siau Island tarsier

Subspecies

• Natuna Islands tarsier

Old World monkeys

Species

Subspecies

New World monkeys

SpeciesSubspecies

Lorisoidea

• Javan slow loris

Odd-toed ungulates

SpeciesSubspecies

Cetartiodactyls

Cetartiodactyla includes dolphins, whales and even-toed ungulates. There are 15 species, nine subspecies, and nine subpopulations of cetartiodactyl assessed as critically endangered.

Non-cetacean even-toed ungulates

SpeciesSubspecies

Cetaceans

Species

• Baiji (possibly extinct)
• Vaquita
• Rice's whale
• North Atlantic right whale
• Atlantic humpback dolphin

SubspeciesSubpopulations

Carnivora

SpeciesSubspeciesSubpopulations

Rodents

There are 58 species and one subspecies of rodent assessed as critically endangered.

Myomorpha

There are 37 species in Myomorpha assessed as critically endangered.

Nesomyids

• Mount Kahuzi climbing mouse

Castorimorpha

SpeciesSubspecies

• Alcorn's pocket gopher

Sciuromorpha

• Namdapha flying squirrel
• Vancouver Island marmot

Other mammals

Species

Subspecies

• Sumatran elephant

Subpopulations

• Juliana's golden mole (1 subpopulation)

See also

• Lists of IUCN Red List critically endangered species
• List of least concern mammals
• List of near threatened mammals
• List of vulnerable mammals
• List of endangered mammals
• List of recently extinct mammals
• List of data deficient mammals

Notes and References

1. Web site: IUCN Red List version 2016-2. The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). 8 September 2016.
2. Web site: Table 9: Possibly Extinct and 1 Possibly Extinct in the Wild Species (IUCN Red List version 2016-2). The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). 8 September 2016.
3. Web site: Limitations of the Data. The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). 11 January 2016.
4. Web site: 2001 Categories & Criteria (version 3.1). The IUCN Red List of Threatened Species. Union for Conservation of Nature and Natural Resources (IUCN). 11 January 2016.