•   Extinct in the wild (EW): 2 species
•   Critically endangered (CR): 203 species
•   Endangered (EN): 505 species
•   Vulnerable (VU): 536 species
•   Near threatened (NT): 345 species
•   Least concern (LC): 3,306 species
•   Data deficient (DD): 872 species

Mammalian species (IUCN, 2020-1)

• 5850 extant species have been evaluated
• 4978 of those are fully assessed^[a]
• 3651 are not threatened at present^[b]
• 1244 to 2116 are threatened^[c]
• 81 to 83 are extinct or extinct in the wild:
  • 81 extinct (EX) species^[d]
  • 2 extinct in the wild (EW)
  • 0 possibly extinct [CR(PE)]
  • 0 possibly extinct in the wild [CR(PEW)]

---

1. ^ excludes data deficient evaluations.
2. ^ NT and LC.
3. ^ Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
4. ^ Chart omits extinct (EX) species

Recently extinct mammals are defined by the International Union for Conservation of Nature (IUCN) as any mammals that have become extinct since the year 1500 CE.^[1] Since then, roughly 80 mammal species have become extinct.^[2]

Extinction of taxa is difficult to confirm, as a long gap without a sighting is not definitive, but before 1995 a threshold of 50 years without a sighting was used to declare extinction.^[1]

One study found that extinction from habitat loss is the hardest to detect, as this might only fragment populations to the point of concealment from humans. Some mammals declared as extinct may very well reappear.^[1] For example, a study found that 36% of purported mammalian extinction had been resolved, while the rest either had validity issues (insufficient evidence) or had been rediscovered.^[3]

As of June 2023, the IUCN listed 233 mammalian species as "critically endangered", while 27% of all mammalian species were threatened with extinction.^[4]

Conventions

All species listed as "Extinct" are classified as being extinct (no known remaining individuals left) by the International Union for Conservation of Nature (IUCN). All species listed as Extinct in the wild are classified as being extinct in the wild, meaning that all remaining individuals of the species reside in captivity. All species listed as "Possibly extinct" are classified as being critically endangered, as it is unknown whether or not these species are extinct.^[5] Extinct subspecies such as the Javan tiger (Panthera tigris sondaica)^[6] are not listed here as the species, in this case Panthera tigris, is still extant. The IUCN Redlist classification for each species serves as a citation, and the superscripted "IUCN" by the date is a link to that species' page. A range map is provided wherever available, and a description of their former or current range is given if a range map is not available.

Causes of extinction

Habitat degradation is currently the main anthropogenic cause of species extinctions. The main cause of habitat degradation worldwide is agriculture, with urban sprawl, logging, mining and some fishing practices close behind. The physical destruction of a habitat, both directly (deforestation for land development or lumber) and indirectly (burning fossil fuels), is an example of this.^[7][8]

Also, increasing toxicity, through media such as pesticides, can kill off a species very rapidly, by killing all living members through contamination or sterilizing them. Persistent organic pollutants (POPs), for example, can bioaccumulate to hazardous levels, getting increasingly more dangerous further up the food chain.^[9]

Disease can also be a factor: white nose syndrome in bats, for example, is causing a substantial decline in their populations and may even lead to the extinction of a species.^[10]

Overhunting also has an impact. Terrestrial mammals, such as the tiger and deer, are mainly hunted for their pelts and in some cases meat, and marine mammals can be hunted for their oil and leather. Specific targeting of one species can be problematic to the ecosystem because the sudden demise of one species can inadvertently lead to the demise of another (coextinction) especially if the targeted species is a keystone species. Sea otters, for example, were hunted in the maritime fur trade, and their drop in population led to the rise in sea urchins—their main food source—which decreased the population of kelp—the sea urchin's and Steller's sea cow's main food source—leading to the extinction of the Steller's sea cow.^[11] The hunting of an already limited species can easily lead to its extinction, as with the bluebuck whose range was confined to 1,700 square miles (4,400 km²) and which was hunted into extinction soon after discovery by European settlers.^[12]

Australia

Island creatures are usually endemic to only that island, and that limited range and small population can leave them vulnerable to sudden changes.^[13] While Australia is a continent and not an island, due to its geographical isolation, its unique fauna has suffered an extreme decline in mammal species, 10% of its 273 terrestrial mammals, since European settlement (a loss of one to two species per decade); in contrast, only one species in North America has become extinct since European settlement.^{[citation needed]} Furthermore, 21% of Australia's mammals are threatened, and unlike in most other continents, the main cause is predation by feral species, such as cats.^[14]

Extinct species

A species is declared extinct after exhaustive surveys of all potential habitats eliminate all reasonable doubt that the last individual of a species, whether in the wild or in captivity, has died.^[15] Recently extinct species are defined by the IUCN as becoming extinct after 1500 CE.^[1]

Common name	Binomial name	Order	Date of extinction	Former range	Picture
Broad-faced potoroo	Potorous platyops Gould, 1844	Diprotodontia	1875 1	Australia
Eastern hare wallaby	Lagorchestes leporides Gould, 1841	Diprotodontia	1889 1	Australia
Lake Mackay hare-wallaby	Lagorchestes asomatus Finlayson, 1943	Diprotodontia	1932 1	Australia
Desert rat-kangaroo	Caloprymnus campestris Gould, 1843	Diprotodontia	1935 1	Australia
Thylacine, or Tasmanian wolf/tiger	Thylacinus cynocephalus Harris, 1808	Dasyuromorphia	1936 1	Australia, Tasmania
Toolache wallaby	Macropus greyi Waterhouse, 1846	Diprotodontia	1939 1	Australia
Desert bandicoot	Perameles eremiana Spencer, 1837	Peramelemorphia	1943 1	Australia
New South Wales barred bandicoot[16]	Perameles fasciata Gray, 1841	Peramelemorphia	mid-19th century	Australia
Southwestern barred bandicoot[16]	Perameles myosuros Wagner, 1841	Peramelemorphia	mid-19th century	Australia
Southern barred bandicoot[16]	Perameles notina Thomas, 1922	Peramelemorphia	mid-19th century	Australia
Nullarbor barred bandicoot[16]	Perameles papillon Travouillon & Phillips, 2018	Peramelemorphia	early 20th century	Australia
Lesser bilby, or Yallara	Macrotis leucura Thomas, 1887	Peramelemorphia	1960s 1	Australia
Southern pig-footed bandicoot	Chaeropus ecaudatus Ogilby, 1838	Peramelemorphia	1950s 1	Australia
Northern pig-footed bandicoot	Chaeropus yirratji Travouillon et al., 2019	Peramelemorphia	1950s
Crescent nail-tail wallaby	Onychogalea lunata Gould, 1841	Diprotodontia	1956 1	Australia (western and central)
Red-bellied gracile opossum, or red-bellied gracile mouse opossum	Cryptonanus ignitus Díaz, Flores and Barquez, 2002	Didelphimorphia	1962 1	Argentina
Nullarbor dwarf bettong	Bettongia pusilla McNamara, 1997	Diprotodontia	early 1500s 1	Australia (Nullarbor Plain)
Steller's sea cow	Hydrodamalis gigas von Zimmermann, 1780	Sirenia	1768 1	Commander Islands (Russia, United States)
Bramble Cay melomys	Melomys rubicola Thomas, 1924	Rodentia	2016 1	Australia (Bramble Cay)
Oriente cave rat	Boromys offella Miller, 1916	Rodentia	early 1500s 1	Cuba
Torre's cave rat	Boromys torrei Allen, 1917	Rodentia	early 1500s 1	Cuba
Imposter hutia	Hexolobodon phenax Miller, 1929	Rodentia	early 1500s 1	Hispaniola (currently Haiti and the Dominican Republic)
Montane hutia	Isolobodon montanus Miller, 1922	Rodentia	early 1500s 1	Hispaniola
Dwarf viscacha	Lagostomus crassus Thomas, 1910	Rodentia	early 1900s 1	Peru
Galápagos giant rat	Megaoryzomys curioi Niethammer, 1964	Rodentia	1500s 1	Santa Cruz Island (Galápagos)
Cuban coney	Geocapromys columbianus Chapman, 1892	Rodentia	early 1500s 1	Cuba
Hispaniolan edible rat	Brotomys voratus Miller, 1916	Rodentia	1536–1546 1	Hispaniola
Puerto Rican hutia	Isolobodon portoricensis Allen, 1916	Rodentia	early 1900s 1	Hispaniola; introduced to Puerto Rico, Saint Thomas Island, Saint Croix, U.S. Virgin Islands and Mona Island
Big-eared hopping mouse	Notomys macrotis Thomas, 1921	Rodentia	1843 1	Australia (central Western Australia)
Darling Downs hopping mouse	Notomys mordax Thomas, 1921	Rodentia	1846 1	Australia (Darling Downs, Queensland)
White-footed rabbit-rat	Conilurus albipes Lichtenstein, 1829	Rodentia	early 1860s 1	Australia (eastern coast)
Capricorn rabbit rat	Conilurus capricornensis Cramb and Hocknull, 2010	Rodentia	early 1500s 1	Australia (Queensland)
Short-tailed hopping mouse	Notomys amplus Brazenor, 1936	Rodentia	1896 1	Australia (Great Sandy Desert)
Long-tailed hopping mouse	Notomys longicaudatus Gould, 1844	Rodentia	1901 1	Australia
Great hopping mouse	Notomys robustus Mahoney, Smith and Medlin, 2008	Rodentia	mid-1800s 1	Australia (Flinders Ranges and Davenport Ranges)
Desmarest's pilorie, or Martinique giant rice rat	Megalomys desmarestii Fischer, 1829	Rodentia	1902 1	Martinique
Saint Lucia pilorie, or Saint Lucia giant rice rat	Megalomys luciae Major, 1901	Rodentia	1881 1	Saint Lucia
Bulldog rat	Rattus nativitatis Thomas, 1888	Rodentia	1903 1	Christmas Island
Maclear's rat	Rattus macleari Thomas, 1887	Rodentia	1903 1	Christmas Island
Darwin's Galápagos mouse	Nesoryzomys darwini Osgood, 1929	Rodentia	1930 1	Galápagos Islands
Gould's mouse	Pseudomys gouldii Waterhouse, 1839	Rodentia	1930 1	Australia (southern half)
Plains rat, or Palyoora	Pseudomys auritus Thomas, 1910	Rodentia	early 1800s 1	Australia (Kangaroo Island and the Younghusband Peninsula)
Pemberton's deer mouse	Peromyscus pembertoni Burt, 1932	Rodentia	1931 1	San Pedro Nolasco Island, Mexico
Samaná hutia	Plagiodontia ipnaeum Johnson, 1948	Rodentia	early 1500s [a] 1	Hispaniola
Hispaniola monkey	Antillothrix bernensis MacPhee, Horovitz, Arredondo, & Jimenez Vasquez, 1995	Primates	early 16th century	Hispaniola (currently Dominican Republic)
Lesser stick-nest rat, or white-tipped stick-nest rat	Leporillus apicalis John Gould, 1854	Rodentia	1933 1	Australia (west-central)
Indefatigable Galápagos mouse	Nesoryzomys indefessus Thomas, 1899	Rodentia	1934 1	Galápagos Islands
Little Swan Island hutia	Geocapromys thoracatus True, 1888	Rodentia	1955 1	Swan Islands, Honduras
Blue-gray mouse	Pseudomys glaucus Thomas, 1910	Rodentia	1956 1	Australia (Queensland, New South Wales)
Buhler's coryphomys or Buhler's rat	Coryphomys buehleri Schaub, 1937	Rodentia	early 1500s 1	West Timor, Indonesia
Insular cave rat	Heteropsomys insulans Anthony, 1916	Rodentia	early 1500s 1	Vieques Island, Puerto Rico
Candango mouse	Juscelinomys candango Moojen, 1965	Rodentia	1960 1	Central Brazil
Anthony's woodrat	Neotoma anthonyi Allen, 1898	Rodentia	1926 1	Isla Todos Santos, Mexico
Bunker's woodrat	Neotoma bunkeri Burt, 1932	Rodentia	1931 1	Coronado Islands, Mexico
Vespucci's rodent	Noronhomys vespuccii Carleton and Olson, 1999	Rodentia	1500 1	Fernando de Noronha, Brazil
St. Vincent colilargo, or St. Vincent pygmy rice rat	Oligoryzomys victus Thomas, 1898	Rodentia	1892 1	Saint Vincent
Jamaican rice rat	Oryzomys antillarum Thomas, 1898	Rodentia	1877 1	Jamaica
Nelson's rice rat	Oryzomys nelsoni Merriam, 1889	Rodentia	1897 1	Islas Marías, Mexico
Nevis rice rat, or St. Eustatius rice rat, St. Kitts rice rat	Pennatomys nivalis Turvey, Weksler, Morris, and Nokkert, 2010	Rodentia	early 1500s [b] 1	Sint Eustatius and Saint Kitts and Nevis
Christmas Island pipistrelle	Pipistrellus murrayi Andrews, 1900	Chiroptera	2009 1	Christmas Island
Sardinian pika	Prolagus sardus Wagner, 1832	Lagomorpha	1774 1	Corsica and Sardinia
Marcano's solenodon	Solenodon marcanoi Patterson, 1962	Eulipotyphla	1500s 1	Dominican Republic
Puerto Rican nesophontes	Nesophontes edithae Anthony, 1916	Eulipotyphla	early 1500s 1	Puerto Rico, Vieques Island, Saint John, U.S. Virgin Islands, and Saint Thomas, U.S. Virgin Islands
Atalaye nesophontes	Nesophontes hypomicrus Miller, 1929	Eulipotyphla	early 1500s 1	Hispaniola
Greater Cuban nesophontes	Nesophontes major Arredondo, 1970	Eulipotyphla	early 1500s 1	Cuba
Western Cuban nesophontes	Nesophontes micrus Allen, 1917	Eulipotyphla	early 1500s 1	Cuba (including Isla de la Juventud)
St. Michel nesophontes	Nesophontes paramicrus Miller, 1929	Eulipotyphla	early 1500s 1	Hispaniola
Haitian nesophontes	Nesophontes zamicrus Miller, 1929	Eulipotyphla	early 1500s 1	Haiti
Lesser Mascarene flying fox, or dark flying fox	Pteropus subniger kerr, 1792	Chiroptera	1864 1	Réunion, Mauritius
Guam flying fox, or Guam fruit bat	Pteropus tokudae Tate, 1934	Chiroptera	1968 1	Guam
Dusky flying fox, or Percy Island flying fox	Pteropus brunneus Dobson, 1878	Chiroptera	1870 1	Percy Islands (Australia)
Large Palau flying fox	Pteropus pilosus Andersen, 1908	Chiroptera	1874 1	Palau
Large sloth lemur	Palaeopropithecus ingens Grandidier, 1899	Primate	1620 1	In green
Aurochs	Bos primigenius Bojanus, 1827	Artiodactyla	1627 1
Bluebuck	Hippotragus leucophaeus Pallas, 1766	Artiodactyla	1800 1
Red gazelle	Eudorcas rufina Thomas, 1894	Artiodactyla	late 1800s 1	Algeria
Schomburgk's deer	Rucervus schomburgki Blyth, 1863	Artiodactyla	1932 1	Thailand
Queen of Sheba's gazelle, or Yemen gazelle	Gazella bilkis Grover and Lay, 1985	Artiodactyla	1951 1	Yemen
Madagascan dwarf hippopotamus	Hippopotamus lemerlei Milne-Edwards, 1868	Artiodactyla	early 1500s [c] 1	Madagascar
Falkland Islands wolf or warrah	Dusicyon australis Kerr, 1792	Carnivora	1876 1	Falkland Islands
Dusicyon avus	Dusicyon avus Burmeister, 1866	Carnivora	early 1500s 1	Argentina, Chile, Brazil, Uruguay, Paraguay
Sea mink	Neogale macrodon Prentiss, 1903	Carnivora	1894 1	United States (Maine, Massachusetts) and Canada (New Brunswick, Newfoundland)
Japanese sea lion	Zalophus japonicus Peters, 1866	Carnivora	1970s 1	Japan, Korea, Russia
Caribbean monk seal	Neomonachus tropicalis Gray, 1850	Carnivora	1952 1	Caribbean Sea
Giant fossa	Cryptoprocta spelea Grandidier, 1902	Carnivora	before 1658 1
Lord Howe long-eared bat	Nyctophilus howensis McKean, 1975	Chiroptera	prior to 1972 1	Lord Howe Island, Australia

Extinct subspecies

Common name	Binomial name	Species	Order	Date of extinction	Former range	Picture
Mississippi Valley wolf	Canis rufus gregoryi Goldman, 1937	Red wolf (Canis rufus)	Carnivora	1980	North America
Caucasian wisent	Bison bonasus caucasicus Turkin and Satunin, 1904	European bison (Bison bonasus)	Artiodactyla	1927	Europe
Carpathian wisent	Bison bonasus hungarorum Kretzoi, 1946	European bison (Bison bonasus)	Artiodactyla	1852	Europe
Quagga	Equus quagga quagga Boddaert, 1785	Plains zebra (Equus quagga)	Perissodactyla	1883	Africa
Japanese wolf	Canis lupus hodophilax Temminick 1839	Grey wolf (Canis lupus)	Carnivora	1905	Asia
Hokkaido wolf	Canis lupus hattai Kishida, 1931	Grey wolf (Canis lupus)	Carnivora	1889	Asia
Atlas bear	Ursus arctos crowtheri Schinz, 1844	Brown bear (Ursus arctos)	Carnivora	1890	Africa
Bali tiger	Panthera tigris sondaica Shwarz,1912	Tiger (Panthera tigris)	Carnivora	1950s	Asia
Caspian tiger	Panthera tigris tigris Illiger, 1815	Tiger (Panthera tigris)	Carnivora	1970s	Asia
Javan tiger	Panthera tigris sondaica Temminick, 1844	Tiger (Panthera tigris)	Carnivora	1980s	Asia
Bubal hartebeest	Alcelaphus buselaphus buselaphus Pallas 1766	Hartebeest (Alcephalus buselaphus)	Artiodactyla	1925	Africa
Portuguese ibex	Capra pyrenaica lusitanica Schlegel, 1872	Iberian ibex (Capra pyrenaica)	Artiodactyla	1892	Europe
Pyrenean ibex	Capra pyrenaica pyreneica Schinz, 1838	Iberian ibex (Capra pyrenaica)	Artiodactyla	2000	Europe
Western black rhinoceros	Diceros bicornis longipes Zukowsky, 1999	Black rhinoceros (Diceros bicornis)	Artiodactyla	2011	Africa
Cape lion	Panthera leo melanochaita Smith, 1842	Lion (Panthera leo)	Carnivora	mid 19th century	Africa
Barbary lion	Panthera leo leo Linnaeus, 1758	Lion (Panthera leo)	Carnivora	1960s	Africa
Southern Rocky Mountain wolf	Canis lupus nubilus Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	1935	North America
Kenai Peninsula wolf	Canis lupus occidentalis Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	1925	North America
Banks Island wolf	Canis lupus arctos Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	1952	North America
Newfoundland wolf	Canis lupus nubilus Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	1911	North America
Florida black wolf	Canis rufus floridanus Miller, 1912	Red wolf (Canis rufus)	Carnivora	1934	North America
Cascade Mountains wolf	Canis lupus nubilus Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	1944	North America
Mogollon mountain wolf	Canis lupus nubilus Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	1970s	North America
Texas wolf	Canis lupus nubilus Nowak, 1995	Grey wolf (Canis lupus)	Carnivora	19th century	North America
Sicilian wolf	Canis lupus cristaldii Angelici and Rossi, 2018	Grey wolf (Canis lupus)	Carnivora	1924	Europe
Mexican grizzly bear	Ursus arctos nelsoni Merriam, 1914	Brown bear (Ursus arctos)	Carnivora	1965	North America
California grizzly bear	Ursus arctos californicus Merriam, 1896	Brown bear (Ursus arctos)	Carnivora	1924	North America
Tarpan	Equus ferus ferus Boddaert, 1785	Wild horse (Equus ferus)	Perissodactyla	1909	Europe

Extinct in the wild

A species that is extinct in the wild is one which has been categorized by the International Union for Conservation of Nature (IUCN) as only known by living members kept in captivity or as a naturalized population outside its historic range due to massive habitat loss. A species is declared extinct in the wild after thorough surveys have inspected its historic range and failed to find evidence of a surviving individual.^[15]

Common name	Binomial name	Order	Date of extinction	Former range	Picture
Père David's deer	Elaphurus davidianus Milne-Edwards, 1866	Artiodactyla	1939 1	China
Scimitar oryx	Oryx dammah Cretzschmar, 1827	Artiodactyla	2000 1	Sahara Desert

Possibly extinct

Extinction of taxa is difficult to detect, as a long gap without a sighting is not definitive. Some mammals declared as extinct may very well reappear.^[1] For example, a study found that 36% of purported mammalian extinction had been resolved, while the rest either had validity issues (insufficient evidence) or had been rediscovered.^[3] As of December 2015, the IUCN listed 30 mammalian species as "critically endangered (possibly extinct)".^[4]

Common name	Binomial name	Order	Last confirmed sighting	Range	Picture
Kouprey, or Forest ox	Bos sauveli Urbain, 1937	Artiodactyla	1988 1
Garrido's hutia	Capromys garridoi Varona, 1970	Rodentia	1989 1[dead link]	Cayo Maja, Cuba
Christmas Island shrew	Crocidura trichura Dobson, 1889	Eulipotyphla	1985 1
Wimmer's shrew	Crocidura wimmeri de Balsac and Aellen, 1958	Eulipotyphla	1976 1
Baiji, or Yangtze river dolphin	Lipotes vexillifer Miller, 1918	Cetacea	2002 [d] 1
Zuniga's dark rice rat	Melanomys zunigae Sanborn	Rodentia	1949 1	Peru
Dwarf hutia	Mesocapromys nanus Allen, 1917	Rodentia	1937 1	Ciénaga de Zapata, Cuba
San Felipe hutia, or Little earth hutia	Mesocapromys sanfelipensis Varona & Garrido, 1970	Rodentia	1978 1	Cuba
One-striped opossum	Monodelphis unistriata Wagner, 1842	Didelphimorphia	1899 1
Gloomy tube-nosed bat	Murina tenebrosa Yoshiyuki, 1970	Chiroptera	1962 1	Tsushima Island and possibly Yaku Island, Japan
New Zealand greater short-tailed bat	Mystacina robusta Dwyer, 1962	Chiroptera	1967 1	Taukihepa / Big South Cape Island, New Zealand
Ethiopian amphibious rat, or Ethiopian water mouse	Nilopegamys plumbeus Osgood, 1928	Rodentia	1920s 1	Mouth of the Lesser Abay River, Ethiopia
Angel Island mouse	Peromyscus guardia Townsend, 1912	Rodentia	1991 1	Isla Ángel de la Guarda, Mexico
Puebla deer mouse	Peromyscus mekisturus Merriam, 1898	Rodentia	1950s 1	Ciudad Serdan and Tehuacán, Mexico
Telefomin cuscus	Phalanger matanim Flannery, 1987	Diprotodontia	1997 1
Montane monkey-faced bat	Pteralopex pulchra Flannery, 1991	Chiroptera	1990s 1
Aru flying fox	Pteropus aruensis Peter, 1867	Chiroptera	1877 1
Emma's giant rat	Uromys emmae Groves and Flannery, 1994	Rodentia	1990s 1	Papua Province, Indonesia
Emperor rat	Uromys imperator Thomas, 1888	Rodentia	1888 1	Guadalcanal, Solomon Islands
Guadalcanal rat	Uromys porculus Thomas, 1904	Rodentia	1888 1	Guadalcanal, Solomon Islands
Malabar large-spotted civet, or Malabar civet	Viverra civettina Blyth, 1862	Carnivora	late 1900s [e] 1