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