List of mammals of the United States

About 490 species of mammals are recorded in the United States. Unincorporated territories like for example Puerto Rico, Guam or Northern Mariana Islands are covered. Mammals introduced and extinct in the Holocene except Pleistocene/Holocene boundary are included.
According to the IUCN Red List 3 of these species are critically endangered, 20 endangered, 15 vulnerable, 20 near threatened and 4 extinct.
Some species are identified as indicated below:
*(A) - Accidental
*(E) - Extinct
*(Ex) - Extirpated (extinct in the US, but exists elsewhere in the world)
*(I) - Introduced
The following tags are used to highlight each species' conservation status as assessed by the International Union for Conservation of Nature:
	Extinct 	No reasonable doubt that the last individual has died.
	Extinct in the wild 	Known only to survive in captivity or as a naturalized population well outside its previous range.
	Critically endangered	The species is in imminent risk of extinction in the wild.
	Endangered 	The species is facing an extremely high risk of extinction in the wild.
	Vulnerable 	The species is facing a high risk of extinction in the wild.
	Near threatened 	The species does not meet any of the criteria that would categorize it as risking extinction but it is likely to do so in the future.
	Least concern 	There are no current identifiable risks to the species.
	Data deficient 	There is inadequate information to make an assessment of the risks to this species.
(v. 2013.2, the data are current as of March 5, 2014)
and the Endangered Species Act:
E 	Endangered
T 	Threatened
XN, XE 	eXperimental Nonessential or Essential population
E(S/A), T(S/A)	Endangered or Threatened due to Similarity of Appearance
(the data are current as of March 28, 2014)
==Subclass: Theria==
===Infraclass: Metatheria===
====Order: Didelphimorphia (common opossums)====
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Didelphimorphia is the order of common opossums of the Western Hemisphere. Opossums probably diverged from the basic South American marsupials in the late Cretaceous or early Paleocene. They are small to medium-sized marsupials, about the size of a large house cat, with a long snout and prehensile tail.
*Family: Didelphidae (American opossums)
**Subfamily: Didelphinae
*** Virginia opossum, D. virginiana 
===Infraclass: Eutheria===
====Order: Cingulata (armadillos)====
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The armadillos are small mammals with a bony armored shell. They are native to the Americas. There are around 20 extant species. Only the nine-banded armadillo is found in the United States.
*Family: Dasypodidae (armadillos)
**Subfamily: Dasypodinae
*** Nine-banded armadillo, D. novemcinctus 
====Order: Rodentia (rodents)====
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Rodents make up the largest order of mammals, with over 40% of mammalian species. They have two incisors in the upper and lower jaw which grow continually and must be kept short by gnawing. Most rodents are small though the capybara can weigh up to .
*Suborder: Hystricognathi
**Family: Erethizontidae (New World porcupines)
***Subfamily: Erethizontinae
**** North American porcupine, E. dorsatum 
**Family: Capromyidae
***Subfamily: Capromyinae
**** Puerto Rican hutia, I. portoricensis (Puerto Rico only) 
*Suborder: Sciurognathi
**Family: Aplodontiidae (mountain beaver)
*** Mountain beaver, A. rufa (ssp. nigra: )
**Family: Castoridae (beavers)
*** American beaver, C. canadensis 
**Family: Sciuridae (squirrels)
***Subfamily: Sciurinae
****Tribe: Pteromyini
***** Northern flying squirrel, G. sabrinus (Carolina northern flying squirrel G. s. coloratus, Virginia northern flying squirrel G. s. fuscus: )
***** Humboldt's flying squirrel, G. oregonensis
***** Southern flying squirrel, G. volans 
****Tribe: Sciurini
***** Abert's squirrel, S. aberti 
***** Arizona gray squirrel, S. arizonensis 
***** Eastern gray squirrel, S. carolinensis 
***** Western gray squirrel, S. griseus 
***** Mexican fox squirrel, S. nayaritensis 
***** Fox squirrel, S. niger (Delmarva fox squirrel, S. n. cinereus: )
***** Douglas squirrel, T. douglasii 
***** Southwestern red squirrel, T. fremonti (Mount Graham red squirrel, T. f. grahamensis: )
***** North American red squirrel, T. hudsonicus 
***Subfamily: Xerinae
****Tribe: Marmotini
***** Harris's antelope squirrel, A. harrisii 
***** Texas antelope squirrel, A. interpres 
***** White-tailed antelope squirrel, A. leucurus 
***** San Joaquin antelope squirrel, A. nelsoni 
***** Gunnison's prairie dog, C. gunnisoni 
***** White-tailed prairie dog, C. leucurus 
***** Black-tailed prairie dog, C. ludovicianus 
***** Utah prairie dog, C. parvidens 
***** Alaska marmot, M. broweri (Alaska only) 
***** Hoary marmot, M. caligata 
***** Yellow-bellied marmot, M. flaviventris 
***** Groundhog, M. monax 
***** Olympic marmot, M. olympus 
***** California ground squirrel, O. beecheyi 
***** Rock squirrel, O. variegatus 
***** Golden-mantled ground squirrel, C. lateralis 
***** Cascade golden-mantled ground squirrel, C. saturatus 
***** Mohave ground squirrel, X. mohavensis 
***** Spotted ground squirrel, X. spilosoma 
***** Round-tailed ground squirrel, X. tereticaudus 
***** Franklin's ground squirrel, P. franklinii 
***** Mexican ground squirrel, I. mexicanus 
***** Rio Grande ground squirrel, I. parvidens 
***** Thirteen-lined ground squirrel, I. tridecemlineatus 
***** Uinta ground squirrel, U. armatus 
***** Belding's ground squirrel, U. beldingi 
***** Northern Idaho ground squirrel, U. brunneus 
***** Southern Idaho ground squirrel, U. endemicus 
***** Columbian ground squirrel, U. columbianus 
***** Wyoming ground squirrel, U. elegans 
***** Arctic ground squirrel, U. parryii (Alaska only) 
***** Richardson's ground squirrel, U. richardsonii 
***** Townsend's ground squirrel, U. townsendii and:
******Merriam's ground squirrel, U. canus 
******Piute ground squirrel, U. mollis 
******Townsend's ground squirrel, U. (townsendii) nancyae 
***** Washington ground squirrel, U. washingtoni 
***** Alpine chipmunk, N. alpinus 
***** Yellow-pine chipmunk, N. amoenus 
***** Gray-footed chipmunk, N. canipes 
***** Gray-collared chipmunk, N. cinereicollis 
***** Cliff chipmunk, N. dorsalis 
***** Merriam's chipmunk, N. merriami 
***** Least chipmunk, N. minimus 
***** California chipmunk, N. obscurus 
***** Yellow-cheeked chipmunk, N. ochrogenys 
***** Palmer's chipmunk, N. palmeri 
***** Panamint chipmunk, N. panamintinus 
***** Long-eared chipmunk, N. quadrimaculatus 
***** Colorado chipmunk, N. quadrivittatus 
***** Red-tailed chipmunk, N. ruficaudus 
***** Hopi chipmunk, N. rufus 
***** Allen's chipmunk, N. senex 
***** Siskiyou chipmunk, N. siskiyou 
***** Sonoma chipmunk, N. sonomae 
***** Lodgepole chipmunk, N. speciosus 
***** Eastern chipmunk, T. striatus 
***** Townsend's chipmunk, N. townsendii 
***** Uinta chipmunk, N. umbrinus 
**Family: Geomyidae
*** Desert pocket gopher, G. arenarius 
*** Attwater's pocket gopher, G. attwateri 
*** Baird's pocket gopher, G. breviceps 
*** Plains pocket gopher, G. bursarius and:
****Hall's pocket gopher, G. jugossicularis 
****Sand Hills pocket gopher, G. lutescens 
*** Knox Jones's pocket gopher, G. knoxjonesi 
*** Texas pocket gopher, G. personatus and:
**** Strecker's pocket gopher, G. streckeri 
*** Southeastern pocket gopher, G. pinetis 
*** Llano pocket gopher, G. texensis 
*** Yellow-faced pocket gopher, P. castanops 
*** Botta's pocket gopher, T. bottae 
*** Camas pocket gopher, T. bulbivorus 
*** Wyoming pocket gopher, T. clusius 
*** Idaho pocket gopher, T. idahoensis 
*** Mazama pocket gopher, T. mazama 
*** Mountain pocket gopher, T. monticola 
*** Northern pocket gopher, T. talpoides 
*** Townsend's pocket gopher, T. townsendii 
*** Southern pocket gopher, T. umbrinus 
**Family: Heteromyidae
***Subfamily: Dipodomyinae
**** Agile kangaroo rat, D. agilis 
**** California kangaroo rat, D. californicus 
**** Gulf Coast kangaroo rat, D. compactus 
**** Desert kangaroo rat, D. deserti 
**** Texas kangaroo rat, D. elator 
**** Heermann's kangaroo rat, D. heermanni (Morro Bay kangaroo rat, D. h. morroensis: )
**** Giant kangaroo rat, D. ingens 
**** Merriam's kangaroo rat, D. merriami (San Bernardino kangaroo rat, D. m. parvus: )
**** Chisel-toothed kangaroo rat, D. microps 
**** Fresno kangaroo rat, D. nitratoides (Fresno subspecies D. n. exilis and Tipton kangaroo rat, D. n. nitratoides: )
**** Ord's kangaroo rat, D. ordii 
**** Panamint kangaroo rat, D. panamintinus 
**** Banner-tailed kangaroo rat, D. spectabilis 
**** Stephens' kangaroo rat, D. stephensi 
**** Dulzura kangaroo rat, D. simulans 
**** Narrow-faced kangaroo rat, D. venustus and:
***** Big-eared kangaroo rat, D. (venustus) elephantinus (D. venustus: )
**** Dark kangaroo mouse, M. megacephalus 
**** Pale kangaroo mouse, M. pallidus 
***Subfamily: Heteromyinae
**** Mexican spiny pocket mouse, L. irroratus 
***Subfamily: Perognathinae
**** Bailey's pocket mouse, C. baileyi 
**** California pocket mouse, Cv californicus 
**** Nelson's pocket mouse, C. nelsoni 
**** Chihuahuan pocket mouse, C. eremicus 
**** San Diego pocket mouse, C. fallax 
**** Long-tailed pocket mouse, C. formosus 
**** Hispid pocket mouse, C. hispidus 
**** Rock pocket mouse, C. intermedius 
**** Desert pocket mouse, C. penicillatus 
**** Baja pocket mouse, C. rudinoris 
**** Spiny pocket mouse, C. spinatus 
**** White-eared pocket mouse, P. alticola 
**** Arizona pocket mouse, P. amplus 
**** Olive-backed pocket mouse, P. fasciatus 
**** Plains pocket mouse, P. flavescens 
**** Silky pocket mouse, P. flavus 
**** San Joaquin pocket mouse, P. inornatus 
**** Little pocket mouse, P. longimembris (Pacific pocket mouse, P. l. pacificus: )
**** Merriam's pocket mouse, P. merriami 
**** Columbia Plateau pocket mouse, P. parvus 
**Family: Dipodidae (jerboas)
***Subfamily: Zapodinae
**** Woodland jumping mouse, N. insignis 
**** Meadow jumping mouse, Z. hudsonius (Preble's meadow jumping mouse, Z. h. preblei: )
**** Western jumping mouse, Z. princeps 
**** Pacific jumping mouse, Z. trinotatus 
**Family: Cricetidae
***Subfamily: Arvicolinae
**** White-footed vole, A. albipes 
**** Red tree vole, A. longicaudus 
**** California red tree mouse, A. pomo 
**** Western red-backed vole, C. californicus 
**** Southern red-backed vole, C. gapperi 
**** Northern red-backed vole, C. rutilus (Alaska only) 
**** Northern collared lemming, D. groenlandicus (Alaska only) 
**** Nelson's collared lemming, D. nelsoni (Alaska only) 
**** Unalaska collared lemming, D. unalascensis (Alaska only) 
**** Sagebrush vole, L. curtatus 
**** North American brown lemming, Lemmus trimucronatus (Alaska only) 
**** Insular vole, M. abbreviatus (Alaska only) 
**** California vole, M. californicus (ssp. scirpen: )
**** Gray-tailed vole, M. canicaudus 
**** Rock vole, M. chrotorrhinus 
****Western meadow vole, M. drummondii 
****Florida salt marsh vole, M. dukecampbelli (M. p. dukecampbelli: )
**** Long-tailed vole, M. longicaudus 
**** Mexican vole, M. mexicanus (including M. mogollonensis: , ssp. hualpaiensis: )) and:
***** Mogollon vole, M. mogollonensis 
**** Singing vole, M. miurus (Alaska only) 
**** Montane vole, M. montanus 
**** Prairie vole, M. ochrogaster 
**** Tundra vole, M. oeconomus (Alaska only) 
**** Creeping vole, M. oregoni 
**** Eastern meadow vole, M. pennsylvanicus (ssp. breweri: )
**** Woodland vole, M. pinetorum 
**** Water vole, M. richardsoni 
**** Townsend's vole, M. townsendii 
**** Taiga vole, M. xanthognathus (Alaska only) 
**** Round-tailed muskrat, N. alleni 
**** Muskrat, O. zibethicus 
**** Western heather vole, P. intermedius 
**** Eastern heather vole, P. ungava 
**** Northern bog lemming, S. borealis 
**** Southern bog lemming, S. cooperi 
***Subfamily: Neotominae
**** Northern pygmy mouse, B. taylori 
**** White-throated woodrat, N. albigula 
**** Bryant's woodrat, N. bryanti 
**** Bushy-tailed woodrat, N. cinerea 
**** Arizona woodrat, N. devia 
**** Eastern woodrat, N. floridana (Key Largo woodrat, N. f. smalli: )
**** Dusky-footed woodrat, N. fuscipes (ssp. riparia: )
**** Desert woodrat, N. lepida {{IUCN status|LC|14589}
**** White-toothed woodrat, Nv leucodon 
**** Big-eared woodrat, N. macrotis 
**** Allegheny woodrat, N. magister 
**** Mexican woodrat, N. mexicana 
**** Southern plains woodrat, N. micropus 
**** Stephen's woodrat, N. stephensi 
**** Golden mouse, O. nuttalli 
**** Texas mouse, P. attwateri 
**** Brush mouse, P. boylii 
**** California mouse, P. californicus 
**** Canyon mouse, P. crinitus 
**** Cactus mouse, P. eremicus 
**** Northern Baja deer mouse, P. fraterculus 
**** Cotton mouse, P. gossypinus (ssp. allapaticola: )
****Gambel's deermouse, P. gambelii 
**** Osgood's mouse, P. gratus 
**** Northwestern deer mouse, P. keeni 
**** southern white-ankled mouse, P. pectoralis 
****Southern deermouse, P. labecula 
**** White-footed mouse, P. leucopus 
**** Eastern deermouse, P. maniculatus 
**** Black-eared mouse, P. melanotis 
**** Mesquite mouse, P. merriami 
**** Northern rock mouse, P. nasutus 
**** Oldfield mouse, P. polionotus (Choctawatchee beach mouse, P. p. allophrys, Perdido Key beach mouse, P. p. trissyllepsis, St. Andrews beach mouse, P. p. peninsularis, Alabama beach mouse, P. p. ammobates and Anastasia Island beach mouse, P. p. phasma: , Southeastern beach mouse, P. p. niveiventris: )
****Western deermouse, P. sonoriensis 
**** Pinyon mouse, P. truei 
**** Florida mouse, P. floridanus 
**** Fulvous harvest mouse, R. fulvescens 
**** Eastern harvest mouse, R. humulis 
**** Western harvest mouse, R. megalotis 
**** Plains harvest mouse, R. montanus 
**** Salt marsh harvest mouse, R. raviventris 
***Subfamily: Sigmodontinae
**** Chihuahuan grasshopper mouse, O. arenicola 
**** Northern grasshopper mouse, O. leucogaster 
**** Southern grasshopper mouse, O. torridus 
****Coues' rice rat, O. couesi 
**** Common marsh rice rat, O. palustris (ssp. natator: )
**** Arizona cotton rat, S. arizonae 
**** Tawny-bellied cotton rat, S. fulviventer 
**** Hispid cotton rat, S. hispidus 
**** Yellow-nosed cotton rat, S. ochrognathus 
====Order: Lagomorpha (lagomorphs)====
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thumb|170px|American pika
thumb|170px|Snowshoe hare
The lagomorphs comprise two families, Leporidae (hares and rabbits), and Ochotonidae (pikas). Though they can resemble rodents, and were classified as a superfamily in that order until the early 20th century, they have since been considered a separate order. They differ from rodents in a number of physical characteristics, such as having four incisors in the upper jaw rather than two.
*Family: Ochotonidae (pikas)
** Collared pika, O. collaris (Alaska only) 
** American pika, O. princeps 
*Family: Leporidae (rabbits, hares)
** Pygmy rabbit, B. idahoensis 
** Antelope jackrabbit, L. alleni 
** Snowshoe hare, L. americanus 
** Black-tailed jackrabbit, L. californicus 
** White-sided jackrabbit, L. callotis 
** Alaskan hare, L. othus (Alaska only) 
** White-tailed jackrabbit, L. townsendii 
** Swamp rabbit, S. aquaticus 
** Desert cottontail, S. audubonii 
** Brush rabbit, S. bachmani (ssp. riparius: )
** Eastern cottontail, S. floridanus 
** Robust cottontail, S. holzneri 
** Mountain cottontail, S. nuttallii 
** Appalachian cottontail, S. obscurus 
** Marsh rabbit, S. palustris (Lower Keys marsh rabbit, S. p. hefneri: )
** New England cottontail, S. transitionalis 
====Order: Eulipotyphla (shrews, hedgehogs, moles, and solenodons)====
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Eulipotyphlans are insectivorous mammals. Shrews and solenodons closely resemble mice, hedgehogs carry spines, while moles are stout-bodied burrowers.
*Family: Soricidae (shrews)
**Subfamily: Soricinae
***Tribe: Blarinini
**** Northern short-tailed shrew, B. brevicauda 
**** Southern short-tailed shrew, B. carolinensis and:
***** Sherman's short-tailed shrew, B. shermani 
***** Everglades short-tailed shrew, B. peninsulae 
**** Elliot's short-tailed shrew, B. hylophaga 
**** North American least shrew, C. parva and:
*****Berlandier's least shrew, C. berlandieri 
***Tribe: Notiosoricini
**** Cockrum's gray shrew, N. cockrumi 
**** Crawford's gray shrew, N. crawfordi and:
***** Ticul's gray shrew, N. tataticuli 
***Tribe: Soricini
**** Glacier Bay water shrew, S. alaskanus (Alaska only) 
**** Arctic shrew, S. arcticus 
**** Arizona shrew, S. arizonae 
**** Baird's shrew, S. bairdi 
**** Marsh shrew, S. bendirii 
**** Cinereus shrew, S. cinereus and:
***** Maryland shrew, S. cinereus fontinalis 
**** Long-tailed shrew, S. dispar and:
***** Gaspé shrew, S. gaspensis 
**** Smoky shrew, S. fumeus 
**** Prairie shrew, S. haydeni 
**** American pygmy shrew, S. hoyi and:
***** Western pygmy shrew, S. eximius 
**** Pribilof Island shrew, S. pribilofensis (Alaska only) 
**** Saint Lawrence Island shrew, Sorex jacksoni (Alaska only) 
**** Southeastern shrew, S. longirostris 
**** Mount Lyell shrew, S. lyelli 
**** Merriam's shrew, S. merriami 
**** Southern montane shrew, S. monticolus and:
*****Northern montane shrew, S. obscurus 
**** Dwarf shrew, S. nanus 
**** New Mexico shrew, S. neomexicanus 
**** Ornate shrew, S. ornatus (ssp. relictus: )
**** Pacific shrew, S. pacificus 
**** American water shrew, S. palustris and:
*****Eastern water shrew, S. albibarbis 
*****Western water shrew, S. navigator 
**** Preble's shrew, S. preblei 
**** Olympic shrew, S. rohweri (formerly in Sorex cinereus)
**** Fog shrew, S. sonomae 
**** Inyo shrew, S. tenellus 
**** Trowbridge's shrew, S. trowbridgii 
**** Tundra shrew, S. tundrensis (Alaska only) 
**** Barren ground shrew, S. ugyunak (Alaska only) 
**** Vagrant shrew, S. vagrans 
**** Alaska tiny shrew, S. yukonicus (Alaska only) 
*Family: Talpidae (moles)
**Subfamily: Scalopinae
***Tribe: Condylurini
**** Star-nosed mole, C. cristata 
***Tribe: Scalopini
**** Hairy-tailed mole, P. breweri 
**** Eastern mole, S. aquaticus 
**** Broad-footed mole, S. latimanus 
**** Coast mole, S. orarius 
**** Townsend's mole, S. townsendii 
**Subfamily: Talpinae
***Tribe: Neurotrichini
**** Shrew-mole, N. gibbsii 
====Order: Chiroptera (bats)====
thumb|Ghost-faced bat
The bats' most distinguishing feature is that their forelimbs are developed as wings, making them the only mammals capable of flight. Bat species account for about 20% of all mammals.
*Family: Vespertilionidae
**Subfamily: Myotinae
*** Silver-haired bat, L. noctivagans 
*** Southwestern myotis, M. auriculus 
*** Southeastern myotis, M. austroriparius 
*** California myotis, M. californicus 
*** Western small-footed myotis, M. ciliolabrum 
*** Long-eared myotis, M. evotis 
*** Gray bat, M. grisescens 
*** Keen's myotis, M. keenii 
*** Eastern small-footed myotis, M. leibii 
*** Little brown bat, M. lucifugus 
*** Dark-nosed small-footed myotis, M. melanorhinus 
*** Arizona myotis, M. occultus 
*** Northern long-eared myotis, M. septentrionalis 
*** Indiana bat, M. sodalis 
*** Fringed myotis, M. thysanodes 
*** Cave myotis, M. velifer 
*** Long-legged myotis, M. volans 
*** Yuma myotis, M. yumanensis 
*** Insular myotis, M. insularum (American Samoa only) 
**Subfamily: Vespertilioninae
*** Pallid bat, A. pallidus 
*** Big brown bat, E. fuscus 
*** Spotted bat, E. maculatum 
*** Allen's big-eared bat, I. phyllotis 
*** Eastern red bat, L. borealis 
*** Hoary bat, L. cinereus (Hawaiian hoary bat, L. c. semotus: )
*** Southern yellow bat, L. ega 
*** Desert red bat, L. frantzii - split from southern red bat, Lasiurus blossevillii 
*** Northern yellow bat, L. intermedius 
*** Seminole bat, L. seminolus 
*** Western yellow bat, L. xanthinus 
*** Evening bat, N. humeralis 
*** Western pipistrelle, P. hesperus 
*** Eastern pipistrelle, P. subflavus 
*** Rafinesque's big-eared bat, P. rafinesquii 
*** Townsend's big-eared bat, P. townsendii (ssp. virginianus and ingens: )
*Family: Pteropodidae
**Subfamily: Pteropodinae
*** Mariana fruit bat, P. mariannus (Guam and Mariana Islands only) 
*** Insular flying fox, P. tonganus (American Samoa only) 
*** Guam flying fox, P. tokudae (Guam only) 
*** Samoa flying fox, P. samoensis (American Samoa only) 
*Family: Molossidae
** Wagner's bonneted bat, E. glaucinus 
** Florida bonneted bat, E. floridanus (formerly in Eumops glaucinus)
** Western mastiff bat, E. perotis 
** Underwood's bonneted bat, E. underwoodi 
** Velvety free-tailed bat, M. molossus 
** Pocketed free-tailed bat, N. femorosaccus 
** Big free-tailed bat, N. macrotis 
** Mexican free-tailed bat, T. brasiliensis 
*Family: Mormoopidae
** Ghost-faced bat, M. megalophylla 
*Family: Phyllostomidae
**Subfamily: Phyllostominae
*** California leaf-nosed bat, M. californicus 
**Subfamily: Glossophaginae
*** Mexican long-tongued bat, C. mexicana 
*** Lesser long-nosed bat, L. yerbabuenae (Leptonycteris curasoae yerbabuenae: )
*** Greater long-nosed bat, L. nivalis 
**Subfamily: Stenodermatinae
*** Velvety fruit-eating bat, E. hartii 
**Subfamily: Desmodontinae
*** Hairy-legged vampire bat, D. ecaudata 
*Family: Emballonuridae
** Pacific sheath-tailed bat, E. semicaudata (Guam and American Samoa only) 
====Order: Carnivora (carnivorans)====
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There are over 260 species of carnivorans, the majority of which feed primarily on meat. They have a characteristic skull shape and dentition.
*Suborder: Feliformia
**Family: Felidae (cats)
*** Jaguarundi, H. yagouaroundi (Ex?) 
*** Ocelot, L. pardalis 
*** Margay, L. wiedii (Ex?) 
*** Canada lynx, L. canadensis 
*** Bobcat, L. rufus 
*** Cougar, P. concolor 
*** Jaguar, P. onca 
*Suborder: Caniformia
**Family: Canidae (dogs)
*** Coyote, C. latrans 
*** Gray wolf, C. lupus (and )
**** Arctic wolf, C. l. arctos (Alaska only) (and )
**** Red wolf, C. l. rufus (and )
**** Eastern wolf, C. l. lycaon 
*** Gray fox, U. cinereoargenteus 
*** Island fox, U. littoralis (ssp. littoralis, catalinae, santarosae and santacruzae: )
*** Arctic fox, V. lagopus (Alaska only) 
*** Kit fox, V. macrotis (ssp. mutica: )
*** Swift fox, V. velox (ssp. hebes: )
*** Red fox, V. vulpes 
**Family: Ursidae (bears)
*** American black bear, U. americanus (Louisiana black bear U. a. luteolus: )
*** Brown bear, U. arctos (includes grizzly bear, Ursus arctos horribilis: , , Alaskan brown bear Ursus arctos middendorffi, also known as the Kodiak bear, and Ursus arctos californicus†, the California grizzly bear )
*** Polar bear, U. maritimus (Alaska only) 
**Family: Procyonidae (raccoons)
*** Ring-tailed cat, B. astutus 
*** White-nosed coati, N. narica 
*** Raccoon, P. lotor 
**Family: Mustelidae (mustelids)
*** Sea otter, E. lutris (ssp. nereis and kenyoni: , ssp. nereis also )
*** Wolverine, G. gulo 
*** North American river otter, L. canadensis 
*** American marten, M. americana 
*** Pacific marten, M. caurina 
*** Beringian ermine or stoat, M. erminea 
***Haida ermine, M. haidarum (Alaska only)
*** Black-footed ferret, M. nigripes (and )
*** Least weasel, M. nivalis 
***American ermine, M. richardsonii 
*** Long-tailed weasel, N. frenata 
*** Sea mink, †N. macrodon (E) 
*** American mink, N. vison 
*** Fisher, P. pennanti 
*** American badger, T. taxus 
**Family: Otariidae (eared seals, sealions)
*** Guadalupe fur seal, A. townsendi 
*** Northern fur seal, C. ursinus 
*** Steller sea lion, E. jubatus (except west of 144° W, where ) (ssp. monteriensis: )
*** California sea lion, Z. californianus 
**Family: Mephitidae
*** American hog-nosed skunk, C. leuconotus 
*** Hooded skunk, M. macroura 
*** Striped skunk, M. mephitis 
*** Western spotted skunk, S. gracilis 
*** Eastern spotted skunk, S. putorius 
**Family: Odobenidae
*** Walrus, O. rosmarus (Alaska only) 
**Family: Phocidae (earless seals)
*** Hooded seal, C. cristata 
*** Bearded seal, E. barbatus 
*** Gray seal, H. grypus 
*** Ribbon seal, H. fasciata (Alaska almost only) 
*** Northern elephant seal, M. angustirostris 
*** Hawaiian monk seal, N. schauinslandi (Hawaiian Islands only) 
*** Caribbean monk seal, †N. tropicalis (E) 
*** Harp seal, P. groenlandicus 
*** Spotted seal, P. largha (Alaska only) 
*** Harbor seal, P. vitulina 
*** Ringed seal, P. hispida 
====Order: Artiodactyla (even-toed ungulates)====
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The even-toed ungulates are ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans.
*Family: Tayassuidae (peccaries)
** Collared peccary, D. tajacu 
*Family: Cervidae (deer)
**Subfamily: Cervinae
*** Elk, C. canadensis 
**Subfamily: Capreolinae
*** Moose, A. alces 
*** Mule deer, O. hemionus 
*** White-tailed deer, O. virginianus (Columbian white-tailed deer, O. v. leucurus, and key deer, O. v. clavium: )
*** Caribou, R. tarandus (Alaska only) (includes migratory woodland caribou, R. t. caribou: ,see also: barren-ground caribou, R. t. groenlandicus)
*Family: Antilocapridae (pronghorn)
** Pronghorn, A. americana (Sonoran pronghorn, A. a. sonoriensis: )
*Family: Bovidae (cattle, antelope, sheep, goats)
**Subfamily: Bovinae
*** American bison, B. bison (wood bison, B. b. athabascae: )
**Subfamily: Caprinae
*** Mountain goat, O. americanus 
*** Muskox, O. moschatus (Alaska only) 
*** Bighorn sheep, O. canadensis (desert bighorn sheep, O. c. nelsoni and Sierra Nevada bighorn sheep, O. c. sierrae: )
*** Dall sheep, O. dalli (Alaska only) 
====Order: Sirenia (manatees and dugongs)====
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Sirenia is an order of fully aquatic, herbivorous mammals that inhabit rivers, estuaries, coastal marine waters, swamps, and marine wetlands.
*Family: Dugongidae
** Dugong, D. dugon (Northern Mariana Islands only) 
** Steller's sea cow, †H. gigas (Alaska only) (E) 
*Family: Trichechidae
** West Indian manatee, T. manatus (Antillean or Caribbean manatee: , ssp. latirostris - Florida manatee: )
====Order: Cetacea (whales)====
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The order Cetacea includes whales, dolphins and porpoises. They are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.
*Suborder: Mysticeti
**Family: Balaenidae
*** Bowhead whale, B. mysticetus (Alaska almost only) (Bering-Chukchi-Beaufort Sea subpopulation: )
*** North Atlantic right whale, E. glacialis 
*** North Pacific right whale, E. japonica (A) (Hawaiian Islands only) (Northeast Pacific subpopulation: )
**Family: Balaenopteridae
***Subfamily: Balaenopterinae
**** Common minke whale, B. acutorostrata 
**** Sei whale, B. borealis 
**** Bryde's whale, B. edeni (A) 
**** Blue whale, B. musculus (ssp. brevicauda - pygmy blue whale: , ssp. musculus North Pacific stock: )
**** Fin whale, B. physalus 
**** Rice's whale, B. ricei 
***Subfamily: Megapterinae
**** Humpback whale, M. novaeangliae 
**Family: Eschrichtiidae
*** Gray whale, E. robustus 
*Suborder: Odontoceti
**Superfamily: Platanistoidea
***Family: Monodontidae
**** Beluga, D. leucas (Cook Inlet subpopulation: )
**** Narwhal, M. monoceros (Alaska only) 
***Family: Phocoenidae
**** Harbour porpoise, P. phocoena 
**** Dall's porpoise, P. dalli 
***Family: Physeteridae
**** Sperm whale, P. macrocephalus 
***Family: Kogiidae
**** Pygmy sperm whale, K. breviceps 
**** Dwarf sperm whale, K. sima (Hawaiian Islands only) 
***Family: Ziphiidae
****Subfamily: Ziphiinae
***** Cuvier's beaked whale, Z. cavirostris 
****Subfamily: Berardiinae
***** Baird's beaked whale, B. bairdii (collective name for two species - Baird's beaked whale and Arnoux's beaked whale)
****Subfamily: Hyperoodontinae
***** Northern bottlenose whale, H. ampullatus 
***** Tropical bottlenose whale, I. pacificus (Hawaiian Islands only) 
***** Sowerby's beaked whale, M. bidens 
***** Hubbs' beaked whale, M. carlhubbsi 
***** Blainville's beaked whale, M. densirostris 
***** Gervais' beaked whale, M. europaeus 
***** Ginkgo-toothed beaked whale, M. ginkgodens 
***** Hector's beaked whale, M. hectori (A) 
***** True's beaked whale, M. mirus 
***** Perrin's beaked whale, M. perrini 
***** Pygmy beaked whale, M. peruvianus (A) 
***** Stejneger's beaked whale, M. stejnegeri 
***Family: Delphinidae (marine dolphins)
**** Long-beaked common dolphin, D. capensis 
**** Short-beaked common dolphin, D. delphis 
**** Pygmy killer whale, F. attenuata 
**** Short-finned pilot whale, G. macrorhynchus 
**** Long-finned pilot whale, G. melas 
**** Risso's dolphin, G. griseus 
**** Fraser's dolphin, L. hosei 
**** Atlantic white-sided dolphin, L. acutus 
**** White-beaked dolphin, L. albirostris 
**** Northern right whale dolphin, L. borealis 
**** Killer whale, O. orca 
**** Melon-headed whale, P. electra 
**** False killer whale, P. crassidens 
**** Pantropical spotted dolphin, S. attenuata 
**** Clymene dolphin, S. clymene 
**** Striped dolphin, S. coeruleoalba 
**** Atlantic spotted dolphin, S. frontalis 
**** Spinner dolphin, S. longirostris 
**** Rough-toothed dolphin, S. bredanensis 
****Pacific white-sided dolphin, S. obliquidens 
**** Common bottlenose dolphin, T. truncatus 
==Introduced animals==
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*Family: Myocastoridae
** Coypu, M. coypus (I) 
*Family: Sciuridae (squirrels)
** Mexican gray squirrel, S. aureogaster (I) 
*Family: Muridae (mice, rats, voles, gerbils, hamsters, etc.)
**Subfamily: Murinae
*** House mouse, M. musculus (I) 
*** Polynesian rat, R. exulans (I) (Hawaiian Islands only) 
*** Brown rat, R. norvegicus (I) 
*** Roof rat, R. rattus (I) 
*Family: Leporidae (rabbits, hares)
** Cape hare, L. capensis (I) 
** European hare, L. europaeus (I) 
** European rabbit, O. cuniculus (I) (Hawaiian Islands only) (I) 
*Family: Cebidae (capuchin and squirrel monkeys)
**Common squirrel monkey, S. sciureus (I) 
*Family: Cercopithecidae (Old World monkeys) 
**Vervet monkey, C. pygerythrus (I) 
**Japanese macaque, M. fuscata (I) 
**Rhesus monkey, M. mulatta (I) 
*Family: Herpestidae (mongoose)
** Small Indian mongoose U. auropunctata (I) (Hawaiian Islands only) 
*Family: Mustelidae (mustelids)
** Beech marten, M. foina (I) 
*Family: Suidae (pigs)
** Wild boar, S. scrofa (I) 
*Family: Cervidae (deer)
** Chital, A. axis (I) 
** Indian hog deer, A. porcinus (I) 
** Red deer, C. elaphus (I) 
** Sika, C. nippon (I) 
** European fallow deer, D. dama (I) 
** Sambar, R. unicolor (I) 
*Family: Bovidae (cattle, antelope, sheep, goats)
**Subfamily: Bovinae
*** Nilgai, B. tragocamelus (I) 
**Subfamily: Hippotraginae
*** Gemsbok, O. gazella (I) 
**Subfamily: Caprinae
*** Barbary sheep, A. lervia (I) 
*** Bezoar ibex, C. a. aegagrus (I) 
*** Siberian ibex, C. sibirica (I) 
*** Himalayan tahr, H. jemlahicus (I) 
**Subfamily: Antilopinae
*** Blackbuck, A. cervicapra (I) 
==See also==
*List of mammals of North America
*List of threatened mammals of the United States
*List of chordate orders
*Lists of mammals by region
*Mammal classification
==Notes==
*Species listed in Mammal Species of the World, 3rd edition (MSW3) as occurring in the USA, but omitted in this article: Pteronotus pristinus - possibly Florida.
==References==
==Further reading==
* 
* 
* 
==External links==
*American Society of Mammalogists
*Databases: Division of Mammals: Department of Vertebrate Zoology: NMNH - i.e. printable Field Guide to mammals of North America
*Search the Division of Mammals Collections - National Museum of Natural History, Smithsonian Institution
*Mammal Species of the World, 3rd edition (MSW3) - database of mammalian taxonomy
*IUCN Red List of Threatened Species (Search results: mammalia, USA, 2014-03-29)
*Endangered Species Program - US Fish & Wildlife Service
*Species Search - US Fish & Wildlife Service
*Endangered Species Act - National Marine Fisheries Service - NOAA 
*List of Endangered and threatened wildlife - US Government Printing Office
United States
*mammals
 
United States