# Small mammals of Yellowstone National Park

There are at least 50 small mammal species known to occur in Yellowstone National Park.
Species are listed by common name, scientific name, typical habitat and relative abundance.

## Raccoons

Order: Carnivora Family: Procyonidae
* Raccoon, Procyon lotor, rivers, cottonwoods, rare

## Badgers and weasels

Order: Carnivora Family: Mustelidae
* Wolverine, Gulo gulo, alpine, coniferous forests, rare
* North American river otter, Lontra canadensis, rivers, lakes, ponds, common
* Pacific marten, Martes caurina, coniferous forests, common
* American ermine, Mustela richardsonii, willows to spruce/fir forests, common
* Long-tailed weasel, Neogale frenata, willows to spruce/fir forests, common
* American mink, Neogale vison, riparian forests, occasional
* Fisher, Pekania pennanti, forests, rare
* American badger, Taxidea taxus, sagebrush, common

## Skunks

Order: Carnivora Family: Mephitidae
* Striped skunk, Mephitis mephitis, riparian to forest, rare

## Hares and rabbits

Order: Lagomorpha Family: Leporidae
* Snowshoe hare, Lepus americanus, forests, willows, common
* White-tailed jackrabbit, Lepus townsendii, sagebrush, grasslands, common
* Desert cottontail, Sylvilagus audubonii, shrub lands, common
* Mountain cottontail, Sylvilagus nuttallii, shrub lands, common

## Pikas

Order: Lagomorpha Family: Ochotonidae
* American pika, Ochotona princeps, rocky slopes, common

## Shrews

Order: Soricomorpha Family: Soricidae
* Dusky shrew, Sorex monticolus, moist meadows, forests, common
* Masked shrew, Sorex cinereus, moist meadows, forests, common
* American water shrew, Sorex palustris, moist meadows, forests, common
* Preble's shrew, Sorex preblei, moist meadows, forests, rare, if present
* Dwarf shrew, Sorex nanus, moist meadows, forests, rare

## Beaver

Order: Rodentia Family: Castoridae
* Beaver, Castor canadensis, ponds, streams, approximately 500

## Squirrels

Order: Rodentia Family: Sciuridae
* Least chipmunk, Tamias minimus, forests, common
* Uinta chipmunk, Tamias umbrinus, forests, common
* Yellow-pine chipmunk, Tamias amoenus, forests, common
* Yellow-bellied marmot, Marmota flaviventris, rocky slopes, common
* Golden-mantled ground squirrel, Callospermophilus lateralis, forests, rocky slopes, common
* Northern flying squirrel, Glaucomys sabrinus, forests, occasional
* American red squirrel, Tamiasciurus hudsonicus, forests, common
* Uinta ground squirrel, Urocitellus armatus, sagebrush, meadows, common

## Pocket gophers

Order: Rodentia Family: Geomyidae
* Northern pocket gopher, Thomomys talpoides, sagebrush, meadows, forests, common

## Mice

Order: Rodentia Family: Cricetidae
* Deer mouse, Peromyscus maniculatus, grasslands, common

## Jumping mice

Order: Rodentia Family: Dipodidae
* Western jumping mouse, Zapus princeps, riparian, occasional

## Muskrats, voles and woodrats

Order: Rodentia Family: Cricetidae
* Muskrat, Ondatra zibethicus, streams, lakes, ponds, common
* Western heather vole, Phenacomys intermedius, sagebrush to forests, occasional
* Long-tailed vole, Microtus longicaudus, moist meadows, common
* Meadow vole, Microtus pennsylvanicus, moist meadows, common
* Montane vole, Microtus montanus, moist meadows, common
* Southern red-backed vole, Myodes gapperi, dense forests, common
* Water vole, Microtus richardsoni, riparian, occasional
* Bushy-tailed woodrat, Neotoma cinerea, rocky slopes, common

## Porcupines

Order: Rodentia Family: Erethizontidae
* North American porcupine, Erethizon dorsatum, forests, sagebrush, willows, common

## Bats

Order: Chiroptera Family: Vespertilionidae
* Big brown bat, Eptesicus fuscus, roost in sheltered areas, common
* Fringe-tailed bat, Myotis thysanodes, roost in cliffs, large snags, uncommon
* Hoary bat, Lasiurus cinereus, roost in trees. uncommon
* Little brown bat, Myotis lucifugus, roost in caves, buildings, trees, common
* Long-eared bat, Myotis evotis, roost in cliffs, buildings, uncommon
* Long-legged bat, Myotis volans, roost in tree cavities, cliffs, buildings, common
* Silver-haired bat, Lasionycteris noctivagans, roost in trees, including snags, common
* Western small-footed bat, Myotis ciliolabrum, roost in rocky areas, caves, rare, if present
* Townsend's big-eared bat, Corynorhinus townsendii, roost in caves, uncommon
* Yuma bat, Myotis yumanensis, roost in caves, buildings, trees. rare, if present