There are 115 mammal species known to occur in Montana. Among Montana's mammals, three are listed as endangered or threatened and the Montana Department of Fish, Wildlife and Parks lists a number of species as species of concern.
Species are listed by common and scientific names, as per R. S. Hoffman and D. L. Pattie, A Guide to Montana Mammals, 1968.
Family: Didelphidae (true opossums)
Family: Leporidae (rabbits and hares)
Family: Ochotonidae (pikas)
Even-toed ungulates (Order: Artiodactyla)
Family: Antilocapridae (pronghorns)
Family: Bovidae (bovids)
Family: Cervidae (deer)
Carnivorans (Order: Carnivora)
Family: Ursidae (bears)
Family: Procyonidae (procyonids)
Family: Felidae (cats)
Family: Canidae (canids)
Family: Mustelidae (mustelids)
- Wolverine, Gulo gulo
- North American river otter, Lontra canadensis
- Pacific marten, Martes caurina
- Black-footed ferret, Mustela nigripes reintroduced
- Least weasel, Mustela nivalis
- American ermine, Mustela richardsonii
- Long-tailed weasel, Neogale frenata
- American mink, Neogale vison
- Fisher, Pekania pennanti
- American badger, Taxidea taxus
Family: Mephitidae (skunks)
Family: Vespertilionidae (vesper bats)
- Pallid bat, Antrozous pallidus
- Townsend's big-eared bat, Corynorhinus townsendii
- Big brown bat, Eptesicus fuscus
- Spotted bat, Euderma maculatum
- Silver-haired bat, Lasionycteris noctivagans
- Eastern red bat, Lasiurus borealis
- Hoary bat, Lasiurus cinereus
- California myotis, Myotis californicus
- Western small-footed myotis, Myotis ciliolabrum
- Long-eared myotis, Myotis evotis
- Little brown bat, Myotis lucifugus
- Northern myotis, Myotis septentrionalis
- Fringed myotis, Myotis thysanodes
- Long-legged bat, Myotis volans
Family: Soricidae
- Northern short-tailed shrew, Blarina brevicauda
- Arizona shrew, Sorex arcticus
- Cinereus shrew, Sorex cinereus
- Hayden's shrew, Sorex haydeni
- American pygmy shrew, Sorex hoyi
- Merriam's shrew, Sorex merriami
- Montane shrew, Sorex monticolus
- Dwarf shrew, Sorex nanus
- American water shrew, Sorex palustris
- Preble's shrew, Sorex preblei
- Vagrant shrew, Sorex vagrans
Rodents (Order: Rodentia)
Family: Castoridae (beavers)
Family: Sciuridae (squirrels)
- Golden-mantled ground squirrel, Callospermophilus lateralis
- White-tailed prairie dog, Cynomys leucurus
- Black-tailed prairie dog, Cynomys ludovicianus
- Northern flying squirrel, Glaucomys sabrinus
- Thirteen-lined ground squirrel, Ictidomys tridecemlineatus
- Hoary marmot, Marmota caligata
- Yellow-bellied marmot, Marmota flaviventris
- Yellow-pine chipmunk, Neotamias amoenus
- Least chipmunk, Neotamias minimus
- Red-tailed chipmunk, Neotamias ruficaudus
- Uinta chipmunk, Neotamias umbrinus
- Eastern gray squirrel, Sciurus carolinensis introduced
- Eastern fox squirrel, Sciurus niger
- American red squirrel, Tamiasciurus hudsonicus
- Uinta ground squirrel, Urocitellus armatus
- Columbian ground squirrel, Urocitellus columbianus
- Wyoming ground squirrel, Urocitellus elegans
- Richardson's ground squirrel, Urocitellus richardsonii
Family: Heteromyidae (pocket mice and kangaroo rats)
Family: Geomyidae (pocket gophers)
Family: Dipodidae (jumping mice)
Family: Cricetidae (New World mice and rats, voles, lemmings, muskrats)
- Sagebrush vole, Lemmiscus curtatus
- Long-tailed vole, Microtus longicaudus
- Montane vole, Microtus montanus
- Prairie vole, Microtus ochrogaster
- Meadow vole, Microtus pennsylvanicus
- Water vole, Microtus richardsoni
- Southern red-backed vole, Myodes gapperi
- Bushy-tailed woodrat, Neotoma cinerea
- Muskrat, Ondatra zibethicus
- Northern grasshopper mouse, Onychomys leucogaster
- White-footed mouse, Peromyscus leucopus
- Western deer mouse, Peromyscus sonoriensis
- Heather vole, Phenacomys intermedius
- Western harvest mouse, Reithrodontomys megalotis
- Northern bog lemming, Synaptomys borealis
Family: Muridae (Old World rats and mice)
Family: Echimyidae (spiny rats)
- Nutria, Myocastor coypus introduced
Family: Erethizontidae
See also
Further reading
Notes