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In September 2016, the International Union for Conservation of Nature (IUCN) listed 783 data deficient mammalian species.[1] Of all evaluated mammalian species, 14% are listed as data deficient. The IUCN also lists 30 mammalian subspecies as data deficient.
- 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[lower-alpha 1]
- 3651 are not threatened at present[lower-alpha 2]
- 1244 to 2116 are threatened[lower-alpha 3]
- 81 to 83 are extinct or extinct in the wild:
- 81 extinct (EX) species[lower-alpha 4]
- 2 extinct in the wild (EW)
- 0 possibly extinct [CR(PE)]
- 0 possibly extinct in the wild [CR(PEW)]
- excludes data deficient evaluations.
Of the subpopulations of mammals evaluated by the IUCN, four species and/or subpopulations have been assessed as data deficient.
This is a complete list of data deficient mammalian species and subspecies evaluated by the IUCN. Species and subspecies which have data deficient subpopulations (or stocks) are indicated. Where possible common names for taxa are given while links point to the scientific name used by the IUCN.
There are 20 species and 26 subspecies of primate evaluated as data deficient.
Gibbons
Subspecies
Lemurs
Species
Subspecies
Tarsiers
Old World monkeys
Species
Subspecies
- Black-nosed red-tailed monkey
- White-nosed moustached monkey
- Pluto monkey
- Dodinga Hills guereza
- Djaffa Mountains guereza
- Mau forest guereza
- Southern black crested mangabey
- Dark-crowned long-tailed macaque
- Burmese long-talied macaque
- Simeulue long-tailed macaque
- Kemujan long-tailed macaque
- Lasia long-tailed macaque
- Maratua long-tailed macaque
- East Sumatran banded langur
- Hose's grizzled langur
- Bicolored banded languar
- Miller's maroon langur
- Davis' maroon langur
- Bintan Island pale-thighed langur
- Buff-bellied langur
New World monkeys
Species
- Hernández-Camacho's night monkey
- Stephen Nash's titi
- Golden-white tassel-ear marmoset
- Vanzolini's bald-faced saki
Subspecies
- Hooded spider monkey
- Lagothrix cana tschudii
- Lako's saddleback tamarin
- Crandall's saddleback tamarin
Cetartiodactyla includes dolphins, whales and even-toed ungulates. There are 61 species, one subspecies, and three subpopulations of cetartiodactyl evaluated as data deficient.
Non-cetacean even-toed ungulates
Cetaceans
There are 45 species, one subspecies, and three subpopulations of cetacean evaluated as data deficient.
Oceanic dolphins
Species
Subpopulations
- Long-finned pilot whale (1 subpopulation)
- Risso's dolphin (1 subpopulation)
Beaked whales
Species
- Giant beaked whale
- Baird's beaked whale (Berardius bairdii)
- Northern bottlenose whale
- Tropical bottlenose whale
- North Atlantic beaked whale
- Andrews' beaked whale
- Hubbs' beaked whale
- Blainville's beaked whale
- Gervais' beaked whale
- Ginkgo-toothed beaked whale
- Gray's beaked whale
- Hector's beaked whale
- Strap-toothed whale
- True's beaked whale
- Perrin's beaked whale
- Pygmy beaked whale
- Stejneger's beaked whale
- Spade-toothed whale
- Shepherd's beaked whale
Subpopulations
- Cuvier's beaked whale (1 subpopulation)
Other cetaceans
Species
Subspecies
- Agricola's gracile opossum
- Guahiba gracile opossum
- Unduavi gracile opossum
- Menzies' echymipera
- Emilia's gracile opossum
- Heavy-browed mouse opossum
- Red mouse opossum
- Tyler's mouse opossum
- Narrow-headed slender opossum
- Creighton's slender opossum
- Dusky slender opossum
- Arfak pygmy bandicoot
- Mouse bandicoot
- Ihering's three-striped opossum
- Woolley's three-striped dasyure
- Tate's three-striped dasyure
- Olrog's four-eyed opossum
- Chestnut dunnart
- Sooty dunnart
- Tate's fat-tailed mouse opossum
- Buff-bellied fat-tailed mouse opossum
Species
Includes tenrecs and golden moles.
Subpopulations
- Silky anteater (1 subpopulation)
There are 83 species in the order Eulipotyphla evaluated as data deficient.
Shrews
- Giant mole shrew
- Sumatran water shrew
- Van Sung's shrew
- Pygmy brown-toothed shrew
- Salenski's shrew
- Lesser Taiwanese shrew
- Greater Congo shrew
- Armenian shrew
- Bottego's shrew
- Caspian shrew
- Dhofar shrew
- Doucet's musk shrew
- Heather shrew
- Fischer's shrew
- Flower's shrew
- Peters's musk shrew
- Greater Mindanao shrew
- Hill's shrew
- Horsfield's shrew
- Katinka's shrew
- Savanna swamp shrew
- Nyiro shrew
- Mindoro shrew
- Mossy forest shrew
- Ugandan musk shrew
- Pale gray shrew
- Phu Hoc shrew
- Pitman's shrew
- Flat-headed shrew
- Polia's shrew
- Kashmir white-toothed shrew
- Rainey's shrew
- Chinese white-toothed shrew
- Egyptian pygmy shrew
- Ugandan lowland shrew
- Sokolov's shew
- Iranian shrew
- Saharan shrew
- Timor shrew
- Ultimate shrew
- Mamfe shrew
- Banka shrew
- Hainan Island shrew
- Mikhail Zaitsev's shrew
- Zaphir's shrew
- Upemba shrew
- Central Mexican broad-clawed shrew
- Eastern Cordillera small-footed shrew
- Honduran small-eared shrew
- Central American least shrew
- Oaxacan broad-clawed shrew
- Peruvian small-eared shrew
- Tropical small-eared shrew
- Schaller's mouse shrew
- Thin mouse shrew
- Grauer's large-headed shrew
- Glacier Bay water shrew
- Valais shrew
- Udine shrew
- Gansu shrew
- Ixtlan shrew
- Kozlov's shrew
- Paramushir shrew
- Ussuri shrew
- New Mexico shrew
- Portenko's shrew
- Chinese shrew
- Tibetan shrew
- Black shrew
- Bornean pygmy shrew
- Suncus hututsi
- Surdisorex schlitteri
- Dudu Akaibe's pygmy shrew
- Kongana shrew
- Lesser forest shrew
- Rain forest shrew
- Bamenda pygmy shrew
Erinaceids
Talpids
Rabbits and relatives
There are 380 rodent species evaluated as data deficient.
Hystricomorpha
There are 82 species in Hystricomorpha evaluated as data deficient.
Tuco-tucos
- Brazilian tuco-tuco
- Budin's tuco-tuco
- Colburn's tuco-tuco
- Puntilla tuco-tuco
- Coyhaique tuco-tuco
- Chacoan tuco-tuco
- Famatina tuco-tuco
- Foch's tuco-tuco
- Lago Blanco tuco-tuco
- San Juan tuco-tuco
- Jujuy tuco-tuco
- Catamarca tuco-tuco
- Tiny tuco-tuco
- San Luis tuco-tuco
- Salta tuco-tuco
- Scaglia's tuco-tuco
- Silky tuco-tuco
- Forest tuco-tuco
- Robust tuco-tuco
- Tucuman tuco-tuco
- Sierra Tontal tuco-tuco
- Strong tuco-tuco
- Vipos tuco-tuco
- Yolanda's tuco-tuco
Chinchilla rats
Dasyproctids
- Azara's agouti
- Orange agouti
- Dasyprocta iacki
- Kalinowski's agouti
- Dasyprocta variegata
Neotropical spiny rat species
- Owl's spiny rat
- Montane bamboo rat
- Colombian soft-furred spiny rat
- Dark spiny tree-rat
- Echimys vieirai
- Barbara Brown's brush-tailed rat
- Orinoco brush-tailed rat (Isothrix orinoci)
- Dusky spiny tree-rat
- Woolly-headed spiny tree-rat
- White-tailed olalla rat
- Greedy olalla rat
- Carriker's speckled tree-rat (Pattonomys carrikeri)
- Yellow speckled tree-rat (Pattonomys flavidus)
- Bare-tailed armored tree-rat
- Orinocan speckled tree-rat (Pattonomys punctatus)
- Kerr's Atlantic tree-rat
- Pallid Atlantic tree-rat
- Southern Atlantic tree rat
- Boyacá spiny rat
- Gardner's spiny rat
- Guyanan spiny rat
- Kulina spiny rat
- Minca spiny rat
- O'Connell's spiny rat
- Trinidad spiny rat
- Thrichomys laurentius
- Peruvian toro
- Dark-caped Atlantic spiny rat
- Spiked Atlantic spiny rat
New World porcupines
Other Hystricomorpha species
- Porter's rock rat
- Sage's rock rat
- Sacha Guinea pig
- Val's gundi
- Felou gundi
- Nigerian mole-rat
- Southern highland yellow-toothed cavy
- Lesser capybara
- Acrobatic cavy
- Ecuadorean viscacha
- Wolffsohn's viscacha
- Kirchner's viscacha rat
Myomorpha
There are 245 species in Myomorpha evaluated as data deficient.
Murids
Includes mice, rats, gerbils, and relatives.
- Luzon broad-toothed rat
- Asia Minor spiny mouse
- Crete spiny mouse
- Cyprus spiny mouse
- Selinda veld rat
- Tinfields rock rat
- Ammodile
- Mindoro climbing rat
- Luzon Cordillera forest mouse
- Large Mindoro forest mouse
- Mindanao lowland forest mouse
- Long-nosed Luzon forest mouse
- Mountain water rat
- Large-toothed hairy-tailed rat
- Kenneth's white-toothed rat
- Manipur white-toothed rat
- Short-footed Luzon tree rat
- Palawan pencil-tailed tree mouse
- Large pencil-tailed tree mouse
- Gray-bellied pencil-tailed tree mouse
- Small pencil-tailed tree mouse
- Sibuyan striped shrew rat
- White-toothed brush mouse
- Dinagat bushy-tailed cloud rat
- Ilin Island cloudrunner
- Celebes shrew rat
- Northern Luzon shrew rat
- Katanglad shrew mouse
- Millard's rat
- Fox's shaggy rat
- Angolan marsh rat
- Crump's mouse
- Berbera gerbil
- Agag gerbil
- Botta's gerbil
- Brockman's gerbil
- Burton's gerbil
- Cosens's gerbil (Gerbillus cosensis)
- Grobben's gerbil
- James's gerbil
- Lowe's gerbil
- Darfur gerbil
- Sudan gerbil
- Occidental gerbil
- Percival's gerbil (Gerbillus percivali)
- Principal gerbil
- Somalian gerbil
- Khartoum gerbil
- Sulawesi root rat
- Arid thicket rat
- Bunting's thicket rat
- Gray-headed thicket rat
- Yunnan bush rat
- Ranee mouse
- Western water rat
- New Britain water rat
- Ziegler's water rat
- Western white-eared giant rat
- Togo mouse
- Hoogstraal's striped grass mouse
- Rosevear's striped grass mouse
- Diwangkara's long-tailed giant rat
- Gray brush-furred rat
- Lesser small-toothed rat
- Little margareta rat
- Dwarf mastomys
- Small Bornean maxomys
- Dollman's spiny rat
- Sumatran spiny rat
- Chestnut-bellied spiny rat
- Sulawesian shrew rat
- Rossel Island melomys
- Bougainville mosaic-tailed rat
- Yamdena mosaic-tailed rat
- Seram long-tailed mosaic-tailed rat
- Riama mosaic-tailed rat
- Pavel's Seram mosaic-tailed rat
- Zarudny's jird
- Northern groove-toothed shrew mouse
- Sumatran shrewlike mouse
- Gounda mouse
- Neave's mouse
- Oubangui mouse
- Ethiopian mylomys
- Limestone rat
- Palawan soft-furred mountain rat
- Short-haired water rat
- Stein's paramelomys
- Paucidentomys vermidax
- Hopkins's groove-toothed swamp rat
- Issel's groove-toothed swamp rat
- Malayan tree rat
- Bornean pithecheirops
- Champion's tree-mouse
- Least soft-furred mouse
- Muton's soft-furred mouse
- Verschuren's swamp rat
- Thin sand rat
- Pseudoberylmys muongbangensis
- German's one-toothed moss mouse
- Musser's shrew mouse
- Western shrew mouse
- White-bellied moss mouse
- Pilliga mouse
- Sunburned rat
- Vogelkop mountain rat
- Aceh rat
- Bonthain rat
- Enggano rat
- Giluwe rat
- Koopman's rat
- Korinch's rat
- Mindoro black rat
- Arianus's rat
- Peleng rat
- Southeastern xanthurus rat
- Tawitawi forest rat
- Timor rat
- Banahao shrew rat
- Rhynchomys tapulao
- Paulina's limestone rat
- Florida naked-tailed rat
- Sommer's Sulawesi rat
- Rupp's mouse
- Salokko rat
- Lovely-haired rat
- Sulawesi montane rat
- Small-eared rat
- Sulawesi forest rat
- Tondano rat
- Long-tailed shrew rat
- Tate's shrew rat
- Shortridge's rat
- Schouteden's thicket rat (Thamnomys schoutedeni)
- Daovantien's limestone rat
- Luzon short-nosed rat
- Great Key Island giant rat
Cricetids
Includes true hamsters, voles, lemmings, and New World rats and mice.
- Diminutive akodont
- Catamarca akodont
- Lindbergh's grass mouse
- Caparaó grass mouse
- Neuquén grass mouse
- Monte akodont
- Tarija akodont
- Philip Myers' akodont
- São Paulo grass mouse
- Variable grass mouse
- White-tailed mountain vole
- Lake Baikal mountain vole
- Ucayali water rat
- White-nosed akodont
- Gray-bellied akodont
- Guaraní akodont
- Red-bellied akodont
- Misiones akodont
- Arroyo of Paradise brucie
- Soricine brucie
- Anderson's rice rat
- Marinho's rice rat
- Magellanic long-clawed akodont
- Las Cajas water mouse
- Chibchan water mouse
- Unalaska collared lemming
- Wrangel lemming
- Alai mole vole
- Gray rice rat
- Patagonian chinchilla mouse
- Burrowing chinchilla mouse
- Emmons's rice rat
- Garlepp's mouse
- Central leaf-eared mouse
- Edith's leaf-eared mouse
- Hylaeamys acritus
- Hylaeamys tatei
- Stolzmann's crab-eating rat
- Tweedy's crab-eating rat
- Rio Guaporé mouse
- Huanchaca mouse
- Wrangel Island lemming
- Anatolian vole
- Evorsk vole
- Felten's vole
- Persian vole
- Muisk vole
- Nasarov's vole (Microtus nasarovi)
- Qazvin vole
- Painted bristly mouse
- Spotted bolo mouse
- Nectomys magdalenae
- Forrest's mountain vole
- Linzhi mountain vole
- Ferreira's fish-eating rat
- Oyapock's fish-eating rat
- Cleber's arboreal rice rat
- Brazilian arboreal rice rat
- Brenda's colilargo
- Oligoryzomys moojeni
- Oligoryzomys rupestris
- Peruvian rice rat
- Curaçao rice rat
- Argentine hocicudo
- Blackish deer mouse
- Peromyscus sagax
- Anita's leaf-eared mouse
- Osgood's leaf-eared mouse
- Liangshan vole
- Sonoran harvest mouse
- Nicaraguan harvest mouse
- Cariri climbing mouse
- Cauca climbing mouse
- Yellow-bellied climbing mouse
- Delicate salt flat mouse
- Harris's rice water rat
- Silky Oldfield mouse
- Hudson's Oldfield mouse
- Popayán Oldfield mouse
- Cajamarca Oldfield mouse
- Rosalinda's Oldfield mouse
- Pichincha Oldfield mouse
- Fulvous-bellied climbing rat
- Panamanian climbing rat
- Marie's vole
- Cerrado red-nosed mouse
Nesomyids
Spalacids
Dipodids
Mouse-like hamsters
Castorimorpha
Sciuromorpha
There are 50 species in Sciuromorpha evaluated as data deficient.
Sciurids
Squirrels, chipmunks, marmots, susliks and prairie dogs
- Black flying squirrel
- Thomas's flying squirrel
- Hairy-footed flying squirrel
- Kloss's squirrel
- Least pygmy squirrel
- Lunda rope squirrel
- Du Chaillu's rope squirrel
- Kintampo rope squirrel
- Sculptor squirrel
- Small sun squirrel
- Zanj sun squirrel
- Bartel's flying squirrel
- Gray-cheeked flying squirrel
- Jentink's flying squirrel
- Sumatran flying squirrel
- Niobe ground squirrel
- Amazon dwarf squirrel
- Santander dwarf squirrel
- Cooper's mountain squirrel
- Black and red bush squirrel
- Lesser pygmy flying squirrel
- Hose's pygmy flying squirrel
- Selangor pygmy flying squirrel
- Hagen's flying squirrel
- Arrow flying squirrel
- Secretive dwarf squirrel
- Whitish dwarf squirrel
- Celebes dwarf squirrel
- Weber's dwarf squirrel
- Slender-tailed squirrel
- Neotropical pygmy squirrel
- Arizona gray squirrel
- Fiery squirrel
- Yellow-throated squirrel
- Bolivian squirrel
- Andean squirrel
- Junín red squirrel
- Sanborn's squirrel
- Davao squirrel
- Palawan montane squirrel
Dormice
Anomaluromorpha
There are 191 species and one subspecies of bat evaluated as data deficient.
Megabats
- Ansell's epauletted fruit bat
- Lesser Angolan epauletted fruit bat
- Hayman's dwarf epauletted fruit bat
- Round-eared tube-nosed fruit bat
- Dragon tube-nosed fruit bat
- Demonic tube-nosed fruit bat
- Nendo tube-nosed fruit bat
- Andersen's flying fox
- Kei flying fox
- Lombok flying fox
- Okinawa flying fox
- Philippine gray flying fox
- Linduan rousette
- Mindoro stripe-faced fruit bat
Microbats
There are 171 species and one subspecies of microbat evaluated as data deficient.
Old World leaf-nosed bats
Species
Subspecies
Horseshoe bats
Vesper bats
- Surat serotine
- Kobayashi's bat
- Lagos serotine
- Sombre bat
- Pungent pipistrelle
- Peters's pipistrelle
- Curry's bat
- Bibundi bat
- Glen's wattled bat
- Allen's spotted bat
- Kenyan wattled bat
- Machado's butterfly bat
- Javan thick-thumbed bat
- Peter's tube-nosed bat
- Harpiola isodon
- False serotine bat
- Gaskell's false serotine
- Strange big-eared brown bat
- Humboldt big-eared brown bat
- Tropical big-eared brown bat
- Anthony's pipistrelle
- Joffre's pipistrelle
- Red-brown pipistrelle
- Burma pipistrelle
- Big-eared pipistrelle
- Vordermann's pipistrelle
- St. Aignan's trumpet-eared bat
- Copper woolly bat
- Ethiopian woolly bat
- Angolan long-eared bat
- Tacarcuna bat
- Hairy-tailed bat
- Big red bat
- Dusky tube-nosed bat
- Southern myotis
- Alcathoe whiskered bat
- Anjouan myotis
- Annamit myotis
- Australian myotis
- Bocharic myotis
- Guatemalan myotis
- Csorba's mouse-eared bat
- Kock's mouse-eared bat
- Herman's myotis
- Insular myotis
- Kashmir cave bat
- Morris's bat
- Singapore whiskered bat
- Felten's myotis
- Orange-fingered myotis
- Schaub's myotis
- Velvety myotis
- Kei myotis
- Yellow serotine
- Heller's pipistrelle
- Melck's house bat
- Temminck's mysterious bat
- Sunda long-eared bat
- Dubious trumpet-eared bat
- Mount Gargues pipistrelle
- Arabian pipistrelle
- Desert pipistrelle
- Eisentraut's pipistrelle
- Aellen's pipistrelle
- Minahassa pipistrelle
- Mouselike pipistrelle
- Dar es Salaam pipistrelle
- Racey's pipistrelle bat
- Ethiopian big-eared bat
- Christie's big-eared bat
- Husson's yellow bat
- Light-winged lesser house bat
- Lesser yellow bat
- Sulawesi yellow bat
- Robbins's yellow bat
- Malagasy yellow bat
Long-fingered bats
Sac-winged bats
Free-tailed bats
- Gallagher's free-tailed bat
- Russet free-tailed bat
- Cinnamon dog-faced bat
- Para dog-faced bat
- Guianan bonneted bat
- Rufous dog-faced bat
- Barnes' mastiff bat
- Niangara free-tailed bat
- Sulawesi free-tailed bat
- Trevor's free-tailed bat
- Sumatran mastiff bat
- Daubenton's free-tailed bat
- Javan mastiff bat
- Johnstone's mastiff bat
- Big-eared mastiff bat
- Mantled mastiff bat
- Wroughton's free-tailed bat
- East Asian free-tailed bat (Tadarida insignis)
- African giant free-tailed bat
Leaf-nosed bats
- Tube-lipped nectar bat
- Honduran fruit-eating bat
- Rosenberg's fruit-eating bat
- Behn's bat
- Chocoan long-tongued bat
- Lonchophylla orcesi
- Northern sword-nosed bat
- Brosset's big-eared bat
- Matses' big-eared bat
- Sanborn's big-eared bat
- Koepcke's hairy-nosed bat
- Least big-eared bat
- Shadowy broad-nosed bat
- Mistratoan yellow-shouldered bat
- Soriano's yellow-shouldered bat
- Greater round-eared bat
- Southern little yellow-eared bat
- Vieira's long-tongued bat
Slit-faced bats
Mouse-tailed bats
Disc-winged bats
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