Mammals of Nevada

Order

Family

Common Name

Species Name

Status

Distribution

Mammal Image Library #s

Mammalian Species #

IUCN Status

Introduced

Diet

Biome

Notes

NV Notes

NV Citations

Rodentia Muridae Long-tailed Vole Microtus longicaudus Data Deficient as M. l. bernardinus, M. l. coronarius, and M. l. leucophaeus, otherwise Lower Risk Rocky Mountains and adjacent foothills, from E Alaska and N Yukon, south through British Columbia and SW Alberta, Canada, to E California and W Colorado; including Pacific coastal taiga to N California; disjunct southern pockets in S California, Arizona, and New Mexico 1157 271         Usually does not make runways and leaves little sign of its presence. Eats green plant material, seeds, fruit, fungi and bark. Habitat is forests, brushy areas, clear-cuts and sagebrush; often found along rivers or streams.    
Rodentia Muridae Montane Vole Microtus montanus Data Deficient as M. m. codiensis and M. m. zygomaticus, Vulnerable as M. m. fucosus and M. m. nevadensis, Lower Risk (nt) as M. m. arizonensis and M. m. rivularis, otherwise Lower Risk (lc) Cascade, Sierra Nevada and Rocky Mountain ranges: SC British Columbia, Canada, south to EC California, S Utah and NC New Mexico; disjunct populations in S Nevada, EC Arizona and WC New Mexico   716         Mainly diurnal. Makes surface runways through grass but may not use runways in other types of vegetation. Habitat is damp grassland, often near streams or marshes, sometimes in low brush or dense woodlands.    
Rodentia Muridae Bushy-tailed Woodrat Neotoma cinerea Lower Risk SE Yukon and westernmost Northwest Territories, south through Alaskan Panhandle, British Columbia and W Alberta, Canada; in W USA, from Washington to W Dakotas as far south as EC California, S Nevada, N Arizona, and NW New Mexico 1166, 1351 564         Adapted for cool climates, using its busy tail as a wrap in cold weather; cannot survive high temperatures. Seldom constructs an elaborate house, but will accumulate mounds of sticks and other rubbish around the nest site. Lives on rocky outcrops, talus slopes, caves and cliffs, in canyons and mountainous areas.    
Rodentia Muridae Desert Woodrat Neotoma lepida Data Deficient as N. l. intermedia, otherwise Lower Risk SE Oregon to C Utah and WC Colorado, south through Nevada, NW Arizona, and S California to S Baja California Sur, Mexico 1252 699         Obtains water from fleshy plants such as yucca and prickly pear cactus. It usually makes a stick house under one of the food plants, or may den among rocks. Lives in deserts and coastal sage scrub; favors areas with rocky outcrops and plentiful succulents.    
Rodentia Muridae Common Muskrat Ondatra zibethicus Data Deficient as O. z. ripensis, otherwise Lower Risk (lc) North America, north to the tree line, including Newfoundland; south to the Gulf of Mexico, Rio Grande and lower Colorado River valleys. Introduced to Czech Republic in 1905 and now widespread in the Palearctic, including C and N Europe, most of Ukraine, Russia and Siberia, adjacent parts of Mongolia and scattered through China, NE Korea, and Honshu Island, Japan; also into southernmost Argentina 1162, 1163 141         Mainly nocturnal, but also active on overcast or rainy days; more likely to be seen by day than other large semiaquatic rodents. Swims well and is more buoyant than a beaver. Habitat is shallow marshes with abundant cattails; less common along streams or in wooded swamps.    
Rodentia Muridae Northern Grasshopper Mouse Onychomys leucogaster Data Deficient as O. l. durranti, otherwise Lower Risk (lc) S Alberta, S Saskatchewan, and SW Manitoba, Canada, south through much of Great Plains and Great Basin region of USA, to NC Sonora and N Tamaulipas, Mexico 253, 1017, 1169 87         Nocturnal; most active on dark moonless nights. Much more carnivorous than most mice, taking large scorpions and beetles and some small vertebrates; also eats seeds and plant material. Mostly very solitary. Habitat is deserts, grasslands, prairies and shrub steppe; favors areas with rather sparse vegetation and sandy soils.    
Rodentia Muridae Southern Grasshopper Mouse Onychomys torridus Data Deficient as O. t. ramona and O. t. tularensis, otherwise Lower Risk (lc) C California, S Nevada, and extreme SW Utah, south to N Baja California Norte, Sonora and N Sinaloa, Mexico 1170 59         Habits similar to Northern Grasshopper Mouse. Nocturnal; travels across open desert floor when hunting and requires sand patches for dust-bathing. Habitat is low desert with scattered shrubs such as creosote bush and mesquite.    
Rodentia Muridae Sagebrush Vole Lemmiscus curtatus Lower Risk Sagebrush steppe and desert from S Alberta and SE Saskatchewan, Canada, south to EC California and NW Colorado, including the Columbia Basin of interior Oregon and Washington 947, 1339           Mainly crepuscular, but can be active at any time. Lives colonially in a shared burrow system, usually built under cover with multiple entrances. Habitat is dry areas with sagebrush or rabbitbrush, on stony soil.    
Rodentia Muridae Brush Deermouse Peromyscus boylii Lower Risk Much of SW USA, from N California to westernmost Oklahoma, south to N Baja California Norta and Trans-Pecos Texas, along the Sierra Madre Occidental and W Central Plateau to Queretaro and W Hidalgo, Mexico 1171 838         Climbs well, but usually nests in rock crevices or under fallen trees. Probably does not dig its own burrows and requires rocks or other ground cover for shelter. Lives in woods and dense brush with rocks, fallen trees, or brush piles; usually found above 3,000 ft to about 8,500 ft.    
Rodentia Muridae North American Deermouse Peromyscus maniculatus Lower Risk (nt) as P. m. anacapae and P. m. clemintis, otherwise Lower Risk (lc) Panhandle of Alaska and across N Canada, south through most of continental USA, excluding the SE and E seaboard, to southernmost Baja California Sur and to NC Oaxaca, Mexico; including many land bridge islands 74, 1175           Woodland forms climb very well and are semi-arboreal. Feeds on seeds, fruit, insects, subterranean fungi and other foods; stores excess in caches. Occupies almost every habitat type, from boreal forest and tundra to desert, prairies, swamps and high mountains.    
Rodentia Muridae Piñon Deermouse Peromyscus truei Lower Risk (nt) as P. t.. comanche, otherwise Lower Risk (lc) USA, SW and C Oregon to W and SE Colorado, south to N Baja California Norte, Mexico, Arizona and New Mexico; isolated populations in N Texas (comanche) and S Baja California Sur (lagunae) 1176 161         Hops away when disturbed, may climb a tree or disappear among rocks if pursued. Eats mostly piñon and juniper seeds, also takes insects and fungi. Prefers piñon and piñon-juniper stands, usually among rocks.    
Rodentia Muridae Western Harvest Mouse Reithrodontomys megalotis Lower Risk SC British Columbia and SE Alberta, Canada; through much of W and NC USA; south to N Baja California Norte and through interior Mexico to C Oaxaca 1018 167         Feeds on small seeds, moth larvae, beetles and other insects. Nests are usually well concealed on the ground or low in vegetation. Prefers wet meadows and overgrown fields; also found in dry areas and clearing in forests.    
Rodentia Geomyidae Plains Pocket Gopher Geomys bursarius Lower risk Southcentral Manitoba, Canada to northwest Indiana, southcentral Texas and northeastern New Mexico. 690   X            
Rodentia Geomyidae Mountain Pocket Gopher Thomomys monticola Lower risk Sierra Nevada Mountains of central and northern California and extreme westcentral Nevada.                  
Rodentia Geomyidae Northern Pocket Gopher Thomomys talpoides Vulnerable as T. t. douglasii, Lower Risk as T. t. limosus and T. t. segregatus, otherwise Lower Risk. Southern British Columbia to central Alberta and southwestern Manitoba, Canada, south to central South Dakota and northern New Mexico, northern Arizona, northern Nevada, and northeastern California.   618 X            
Rodentia Heteromyidae California Kangaroo Rat Dipodomys californicus   South central Oregon, northwestern Nevada, and northern California to north of San Francisco Bay.   324 Lower Risk (lc)   Eats mostly seeds of shrubs and grasses; does not store seeds in burrow but makes small caches in soil. Habitat is brushy hills and chaparral; avoids dense vegetation. Also found on well-drained rocky or stony soils.  Sometimes burrows under boulders. Considered distinct from heermanni based on chromosomal (Fashing, 1973) and biochemical data (Patton et al., 1976).  Hall (1981:578) listed californicus as a subspecies of heermanni, without discussion of Patton et al. (1976). Reviewed by Kelt (1988b, Mammalian Species No. 324). Williams et al. (1993) regarded eximius Grinnell and saxatilis Grinnell and Linsdale as valid subspecies.    
Rodentia Heteromyidae Desert Kangaroo Rat Dipodomys deserti   Deserts of eastern California, to southern and western Nevada, southwestern Utah, western and south central Arizona (USA), northwestern Sonora and northeastern Baja California (Mexico). 1324 339 Lower Risk (lc)     Lives in sand dunes and hot dry deserts with loose, deep sandy soils. Revised by Nader (1978).  Reviewed by Best et al. (1989, Mammalian Species No. 339).  Williams et al. (1993) regard each named form as valid subspecies.  Mainly nocturnal, but may actively excavate new burrows or remove sand from existing burrows during the day. Burrows have several entrances, often under shrubs, leading to a maze of tunnels with food storage and a nest chamber.    
Rodentia Sciuridae Yellow-pine chipmunk Tamias amoenus   Northwestern United States; Idaho, Washington Oregon, northern Nevada and Utah, western Wyoming and Montana, and mountainous areas of California. 1913, 1914 390 Least concern            
Rodentia Sciuridae Cliff chipmunk Tamias dorsalis   Southwestern United States including Nevada, Utah, Arizona, and New Mexico into northern Mexico.   399 Least concern            
Rodentia Sciuridae Least chipmunk Tamias minimus   North central states including Minnesota, Wisconsin, and northern Michigan.  Also occupies much of the Rocky Mountains and western Great Plains. 108 653 Least concern            
Rodentia Sciuridae Uinta chipmunk Tamias umbrinus   Mountainous areas of Nevada, Utah, Arizona, California, Colorado, Wyoming, Idaho, and Montana.     Least concern            
Rodentia Sciuridae Belding's ground squirrel Urocitellus beldingi   Mountainous areas of the western United States; eastern Oregon, southwestern Idaho, much of Nevada, and northeastern California. 1107, 1887 221 Least concern            
Rodentia Sciuridae Merriam's ground squirrel Urocitellus canus   Much of eastern Oregon, northwestern Nevada, extreme northeastern California, and southwestern Idaho.     Least concern            
Rodentia Sciuridae Wyoming ground squirrel Urocitellus elegans   There are three disjunct populations.  One is in southwestern Montana.  One is in much of Wyoming, extreme southeastern Idaho, and northern Colorado.  One is in southeastern Idaho, northeastern Nevada, and extreme southeastern Oregon. 99, 1341 214 Least concern            
Rodentia Heteromyidae Merriam's Kangaroo Rat Dipodomys merriami   Northwestern Nevada and northeastern California to Texas, south to Baja California Sur, northern Sinaloa and Mexican Plateau to San Luis Potosi, Mexico. 1327, 1328   Critically Endangered as D. margaritae and D. insularis; Data Deficient as D. m. collinus and D. m. parvus; otherwise Lower Risk (lc).   Eats a variety of seeds, also green plant material and some insects. Habitat is open deserts with scattered grasses and shrubs, on sand, clay or gravelly soils. Revised by Lidicker (1960).  Includes insularis Merriam, viewed as a separate species by Lidicker (1960; see also Huey, 1964, Hall, 1981, and Best and Thomas, 1991a, Mammalian Species No. 374), but as a subspecies of merriami by Best and Janecek (1992), Williams et al. (1993), and Patton and Alvarez-Castañeda (2000).  Also includes margaritae Merriam (see Lidicker, 1960; Williams et al., 1993; Patton and Alvarez-Castañeda, 1999), which has been considered by others to be a distinct species (Best, 1992, Mammalian Species No. 400; Hall, 1981; Huey, 1964).  The inclusion of both insularis and margaritae within merriami is supported by mitochondrial DNA sequence data (Riddle et al., 2000b), although these same data may eventually result in separation of populations of merriami (including insularis and margaritae) from the southern half of the Baja California Peninsula as a species separate from the remaining parts of the species’ range.  This species makes short simple burrows that do not result in a mound; entrances are usually under a shrub.    
Rodentia Heteromyidae Chisel-toothed Kangaroo Rat Dipodomys microps   Southeastern Oregon and southwestern Idaho, south through northwestern and southeastern California, Nevada, and western Utah, to northwestern Arizona (USA).   389 Vulnerable as D. m. leucotis, Data Deficient as D. m. alfredi, otherwise Lower Risk.   Eats more leaves than seeds and will climb into shrubs to harvest food. Prefers desert valleys dominated by saltbush and upland deserts with blackbush; less common in other desert communities and on sand dunes. Revised by Hall and Dale (1939); reviewed by Csuti (1979) and Hayssen (1991, Mammalian Species No. 389). Williams et al. (1993) listed valid subspecies.  Stores food in burrow.    
Rodentia Heteromyidae Ord's Kangaroo Rat Dipodomys ordii   Southwestern Saskatchewan and southeastern Alberta (Canada) and southeastern Washington south through Great Plains and intermontane basins of western USA, to Mexican Plateau as far south as Hidalgo (Mexico). 560, 693, 1099, 1352 353 Lower Risk (lc)     Lives in dry grasslands, desert scrub, piñon-juniper and sagebrush, almost always on fine sandy soils or sand dunes. Revised by Setzer (1949) and reviewed by Garrison and Best (1990, Mammalian Species No. 353); subspecies follow Williams et al. (1993).  Does not include compactus, see Schmidly and Hendricks (1976), Baumgardner and Schmidly (1981), and comment under that species.  Williams et al. (1993) provide a list of what they consider as valid subspecies.  Most active on dark cloudy nights, seldom above ground by day or in bad weather. Makes deep burrows, with entrances often under shrubs or on banks.    
Rodentia Heteromyidae Panamint Kangaroo Rat Dipodomys panamintinus   Deserts of eastern California and western Nevada (USA). 1331 354 Lower Risk (lc)     Prefers open desert with scattered shrubs, on sand, gravel or salt-encrusted soils. Also found in open piñon-juniper desert. Reviewed by Intress and Best (1990, Mammalian Species No. 354) and Williams et al. (1993).  Makes a series of erratic leaps if alarmed. Does not climb, but swims well.    
Rodentia Heteromyidae Dark Kangaroo Mouse Microdipodops megacephalus   Southeastern Oregon, southern Idaho, northeastern and east central California, northern and central Nevada, and westcentral Utah (USA). 1100 46 Vulnerable as M. m. atrirelictus, Data Deficient as M. m. nexus, otherwise Lower Risk.     Prefers sand dunes and deserts with fine sand soils, but where it overlaps with Pale Kangaroo Mouse it is found on gravelly soil. Reviewed by O'Farrell and Blaustein (1974a, Mammalian Species No. 46).  Hafner et al. (1979) discounted the suggestion by Hall (1941:380-382) of hybridization between megacephalus and pallidus.  Also, Hall's suggestion (1981:560) that leucotis may warrant specific status is not supported (see Hafner and Hafner, 1983).  Subspecies listed by Williams et al. (1993).  Feeds in the open, unlike pocket mice. Hibernates November-March.    
Rodentia Heteromyidae Pale Kangaroo Mouse Microdipodops pallidus   Eastcentral California, western and southcentral Nevada (USA).   47 Vulnerable as M. p. restrictus, otherwise Lower Risk (lc).   Small seeds and insects. Habitat is sand dunes and valleys with fine soft sand. Reviewed by O'Farrell and Blaustein (1974b, Mammalian Species No. 47).  Subspecies follow Williams et al. (1993).  Very similar to Dark Kangaroo Mouse. Is most active 1-2 hours after sunset.    
Rodentia Heteromyidae Long-tailed Pocket Mouse Chaetodipus formosus   Western Utah, Nevada, eastern California, and northwest Arizona (USA), and eastern coast of Baja California to Bahía Concepcion (Baja California Sur, Mexico).     Lower Risk (lc)     Usually found among rocks or on gravelly soils in shrubby deserts; occasionally found in sandy soils. Reviewed by Huey (1964).  Included in Perognathus by Hall (1981:542) and earlier workers, but allocated to Chaetodipus by Patton et al. (1981) and Hafner and Hafner (1983).  Subspecies reviewed by Williams et al. (1993).  Inactive in cold weather and for most of the winter.    
Rodentia Heteromyidae Desert Pocket Mouse Chaetodipus penicillatus   Southeastern California and southern Nevada to southern Arizona and southwestern New Mexico to northeastern Baja California and Sonora, Mexico. 1095 767 Lower Risk (lc)   Eats mainly seeds. Habitat is sandy, open deserts with sparse vegetation; avoids rocky soil. Revised by Hoffmeister and Lee (1967).  Subspecies reviewed by Williams et al. (1993).  Excludes Chihuahuan Desert subspecies atrodorsalis and eremicus, now regarded as a separate species, C. eremicus (see account above and Lee et al., 1996).  Sometimes climbs small trees or shrubs in search of food.  Becomes torpid in winter, staying in burrow and eating stored seeds.    
Rodentia Heteromyidae Spiny Pocket Mouse Chaetodipus spinatus   Southern Nevada, southeastern California (USA) south to Cape Region of Baja California Peninsula (Mexico). 751 385 Lower Risk (lc)     Habitat is rocky slopes and boulders with sparse vegetation. Reviewed by Lackey (1991b, Mammalian Species No. 385).  Subspecies reviewed by Williams et al. (1993) and Patton and Alvarez-Castañeda (1999).  Habits are poorly known.    
Rodentia Heteromyidae Little Pocket Mouse Perognathus longimembris U.S. ESA – Endangered as P. l. pacificus. Southeastern Oregon and western Utah (USA) south to northern Sonora and Baja California and Baja California Sur (Mexico) (see Alvarez-Castañeda et al., 2001).     Critically Endangered as P. l. pacificus, Vulnerable as P. l. brevinasus, Data Deficient as P. l. bangsi and P. l. internationalis; otherwise Lower Risk (lc).     Habitat is desert scrub, on sandy or gravelly soils with sparse vegetation. Also found in dry grassland and coastal sage. Revised by Osgood (1918); subspecies listed by Hall (1981) and Williams et al. (1993), who placed psammophilus von Bloeker with P. inronatus instead of longimembris, where this taxon has usually been assigned (Hall, 1981; Patton, 1993b).  Stays below ground for up to 9 months in winter, arousing from torpor occasionally to feed on stored seeds.    
Rodentia Heteromyidae Great Basin Pocket Mouse Perognathus parvus   Great Basin from southern British Columbia (Canada), south to eastern California and east to southeastern Wyoming and northwestern Arizona (USA). 752, 753 318 Lower Risk (lc) as P. parvus and P. xanthanotus.     Prefers dry sandy regions dominated by sagebrush, but also occurs in grassland, desert and open woodlands. Reviewed by Verts and Kirkland (1988, Mammalian Species No. 318).  Includes xanthonotus (Williams et al., 1993), often considered a distinct species (Hall, 1981; Patton, 1993b; Verts and Kirkland, 1988, by omission).  Remains belowground November-March. Breeds April-October; litter size is 2-8.    
Rodentia Muridae House Mouse Mus musculus Lower risk Every state in the United States. 92, 754                
Rodentia Muridae Brown Rat Rattus norvegicus Lower risk Scattered across the United States but very scarce, in not absent, from the Rocky Mountains (might looks this way because of sampling effort). 755, 756, 757, 758                
Rodentia Muridae Roof Rat Rattus rattus Lower risk Distributed around the outside of the country.  Not many records of this species being collected in the interior of the country (this might be because of sampling effort). 759, 760                
Rodentia Sciuridae White-tailed antelope squirrel Ammospermophilus leucurus   Southeastern Oregon and southwestern Idaho through most of Utah and Nevada, includes western Colorado, northwestern New Mexico, Northern Arizona, interior, southern, and central California. 112 368 Least concern            
Rodentia Sciuridae Golden-mantled ground squirrel Callospermophilus lateralis   Mountains of western United States and Canada. 100, 1108, 1726, 1727, 1885 440 Least concern            
Rodentia Sciuridae Yellow-bellied marmot Marmota flaviventris   Western United States through the Rocky Mountains, Sierra Nevada and Intermountain west. 106 135 Least concern       M. f. engelhardti reported from Washington County, Utah - 20 miles from AZ border    
Rodentia Sciuridae Rock squirrel Otospermophilus variegatus   Nevada to southwestern Texas and Utah to Puebla. 951 272 Least concern            
Carnivora Canidae Eastern Coyote Canis latrans Common Throughout continental US. 265 (C), 1126, 1127 (B), 1267 79         Larger than western coyote.    
Carnivora Canidae Kit Fox Vulpes macrotis Common Southwestern US. 269, 1208 (B) 123         Smallest North American canid.  Large ears and black tail tip.    
Carnivora Canidae Grey Fox Urocyon cinereoargenteus Common Nationwide except for the northwest. 584 189         Black dorsal stripe on tail; climbs trees.    
Carnivora Mustelidae Ermine or Short-tailed Weasel Mustela erminea Common All of Canada, northeastern US, Great Lakes region, northwestern US. 588 (P), 1051 (P) 195         Color varies seasonally, mainly eats rodents and young rabbits, as well as small vertebrates and invertebrates.  Nocturnal. Shriek loudly when attacking or is cornered  
Carnivora Mustelidae Long-tailed weasel Mustela frenata Common Southwestern Canada, everywhere south of Canada/US border to South America except arid desert areas of southwest US and northwest Mexico. 1348 570         Prefers rodents, but feeds on a broad array of small vertebrates.  Agile swimmer.  Northern populations vary in color seasonally, but not southern populations.    
Carnivora Mustelidae American Badger Taxidea taxus Common within range Western and central North America, from central Canada to central Mexico. 701 (C), 702 (A), 703 (H) 26         Because of their secretive and fossorial (digging) habits badgers are not often seen.  Persecuted by humans, though sometimes inadvertently when taking poisoned meat meant for wolves and coyotes. Feet are large and clawed; specialized for digging.  
Carnivora Mustelidae Northern River Otter Lontra canadensis Common in the northern part of its range, uncommon to extirpated in southern parts of its range. Alaska and most of the continental US except for much of the southwestern continental US. 802 (A), 859 (W) 587         Playful, likes to slide on the snow.  Eats fish and other aquatic or amphibious animals.    
Carnivora Mephitidae Western Spotted Skunk Spilogale gracilis Unknown Western continental US.   674         Other than what is known about skunks in general, not much is known about this species specifically.    
Carnivora Mephitidae Striped Skunk Mephitis mephitis Common Throughout continental US except a small area in southern California, Nevada, and Arizona. 280 173         Sometimes de-scented and kept as pets (not recommended).  Good "mouser" and will use cat litter boxes.    
Carnivora Procyonidae Ringtail, Bassarisk, or Cacomistle Bassariscus astutus Common Southwestern US from the Gulf of Mexico to the west coast. 858 327         Nocturnal and seldom seen.  Good climber of rocks and trees.  Solitary and territorial, but can be densely populated in good habitat.    
Carnivora Procyonidae Raccoon Procyon lotor Common Common throughout US except portions of California, Arizona, and New Mexico. 140, 709 (S) 119         Raccoons are extremely adaptable and can live in a wide range of temperatures.  They are found virtually anywhere there is water.  Their diet is extremely varied including plant and animal material.  The forefeet of raccoons end in highly sensitive hand-l    
Carnivora Felidae Mountain Lion, Puma, or Cougar Puma concolor Stable in the western, Endangered in Florida. Western contiguous US, small population in Florida. 275, 276, 586           Cougars are active mainly at dusk, night, and dawn.  Most of their prey consists of larger animals such as ungulates, but turtles, rabbit-sized animals, coyotes, and other cougars are taken.  The name "concolor" comes from the even coloration that differs    
Carnivora Felidae Bobcat Lynx rufus Rare or common, depending on geographic region. All of contiguous US, except for parts of California, Utah, Colorado,  agricultural areas of the midwest and coastal areas of the midAtlantic states. 819, 1293 563         As with the Canada lynx, bobcats are very secretive and seldom observed even in areas it occupies.  Slightly smaller than the lynx, it is capable of taking adult white-tailed deer.  Though mainly a carnivore,  areas a large array of plant and animal mater    
Artiodactyla Cervidae Mule Deer Odocoileus hemionus Common Southern Alaska to central Mexico, east across US and Canada to South Dakota Nebraska, Kansas, and western Texas.   219              
Artiodactyla Cervidae White-tailed Deer Odocoileus virginianus Common Throughout North America, except northern Canada and very arid areas of western US. 1313 388              
Artiodactyla Cervidae Moose Alces americanus Common within its range Most of sub-arctic Canada, Alaska, Montana, Idaho,  western Wyoming, Minnesota, New York, New England. 192, 618 154              
Artiodactyla Antilocapridae Pronghorn Antelope Antilocapra americana Common West-central US with some extensions across the border with Canada and some ranging into central Mexico. 166, 717,718, 823, 1310 90       Open areas      
Artiodactyla Bovidae Bighorn Sheep Ovis canadensis Common in historic range Mountainous and hilly areas of the western contiguous US and southern Canada. 168, 169, 307, 941 230              
Chiroptera Vespertilionidae Big Brown Bat Eptesicus fuscus Lower Risk (lc) Throughout the contiguous US and Alaska 39, 223 356 Lower Risk (lc)       TRIBE Eptesicini    
Chiroptera Vespertilionidae Western Red Bat Lasiurus blossevillii Lower Risk (lc) West coast and southwestern United States     Lower Risk (lc)       TRIBE Lasiurini    
Chiroptera Vespertilionidae Hoary Bat Lasiurus cinereus Lower Risk (lc) Throughout the contiguous United States and Hawaii 656, 041, 042 185 Lower Risk (lc)       TRIBE Lasiurini; *Status is Low Risk eith the exception of L. c. semotus    
Chiroptera Vespertilionidae Canyon Bat Parastrellus hesperus Lower Risk (lc) Arid west and southwestern United States     Lower Risk (lc)       TRIBE Pipistrellini Smallest bat in the USA.  
Chiroptera Vespertilionidae Townsend's Big-eared bat Corynorhinus townsendii Vulnerable Western United States, east to the Rocky Mountains, a few scattered populations in the eastern United States 229 175 Vulnerable       TRIBE Plecotini; *Status is Vulnerable as Plecotus townsendii; Endangered as P. ingens and P. virginianus    
Chiroptera Vespertilionidae Spotted Bat Euderma maculatum Lower Risk (lc) Rocky Mountain area of the United States from Idaho to the western tip of Texas 734 77 Lower Risk (lc)       TRIBE Plecotini    
Chiroptera Vespertilionidae Pallid Bat Antrozous pallidus Lower Risk (lc) Semi-arid Western United States, east to western edge of Kansas 230 213 Lower Risk (lc)            
Chiroptera Vespertilionidae Silver-haired Bat Lasionycteris noctivagans Lower Risk (lc) Throughout the United States except extreme southern protions of southern states.  Also occurs in southeastern Alaska. 658 172 Lower Risk (lc)            
Chiroptera Vespertilionidae Californian Myotis Myotis californicus Lower Risk (lc) Southern Alaska panhandle, western United States from Washington to western tip of Texas   428 Lower Risk (lc)            
Chiroptera Vespertilionidae Western Small-footed Bat Myotis ciliolabrum Lower Risk (lc) Much of the western United States   670 Lower Risk (lc)            
Chiroptera Vespertilionidae Little Brown Myotis Myotis lucifugus Lower Risk (lc) Most of US, except Texas to Nebraska, and extreme southern portions of southern states 224, 225, 814 142 Lower Risk (lc)            
Chiroptera Vespertilionidae Dark-nosed Small-footed Myotis Myotis melanorhinus Not evaluated Washington to western Oklahoma, extending southwest to the western tip of Texas     Not evaluated            
Chiroptera Vespertilionidae Fringed Myotis Myotis thysanodes Lower Risk (lc) Western tip of Texas to southwestern South Dakota and west to coast   137 Lower Risk (lc)            
Chiroptera Vespertilionidae Long-legged Myotis Myotis volans Lower Risk (lc) Alaska panhandle to California, east to western tip of Texas and western North Dakota   224 Lower Risk (lc)            
Chiroptera Vespertilionidae Yuma Myotis Myotis yumanensis Lower Risk (lc) California north to Washington, east to Montana and western Texas     Lower Risk (lc)            
Chiroptera Phyllostomidae Mexican Long-tongued Bat Choeronycteris mexicana Lower Risk (nt) Southern California, Nevada, Arizona, and New Mexico; a single record from southern Texas   291 Lower Risk (nt)       TRIBE Glossophagini    
Chiroptera Phyllostomidae Californian Leaf-nosed Bat Macrotus californicus Vulnerable Southern Nevada, southern Arizona, and southern California     Vulnerable            
Chiroptera Molossidae Greater Bonneted Bat Eumops perotis Lower Risk (lc) California to Texas   534 Lower Risk (lc)            
Chiroptera Molossidae Pocketed Free-tailed Bat Nyctinomops femorosaccus Lower risk (lc) Southwestern Texas to New Mexico, Arizona, California   349 Lower Risk (lc)            
Chiroptera Molossidae Big Free-tailed Bat Nyctinomops macrotis Lower risk (lc) Southern and western Texas to southern California; southern Nevada, Utah and Colorado; reported from Iowa and Kansas 891 351 Lower Risk (lc)            
Chiroptera Molossidae Brazilian/Mexican Free-tailed Bat Tadarida brasiliensis Lower Risk (nt) From Oregon to North Carolina and south 1549 331 Lower Risk (nt)            
Lagomorpha Leporidae Pygmy Rabbit Brachylagus idahoensis Endangered in WA; otherwise Lower Risk Southwest Oregon to east central California, southwest Utah, north to southwest Montana, west central Washington.   125       Closely associated with dense stands of sagebrush. Mostly crepuscular, but can be seen by day. Walks or scurries instead of walks, and lives in underground burrows.    
Lagomorpha Leporidae Snowshoe Hare Lepus americanus Lower risk Southern and central Alaska to southern and central coasts of Hudson Bay to Newfoundland and Anacosti Island, Canada, south to southern Appalachians, southern Michigan, North Dakota, north central New Mexico, south central Utah, and east central California. 246, 544           Mostly nocturnal or crepuscular; shelters by day under logs or in thick vegetation. Lives in forests and dense thickets, often associated with low wet areas.    
Lagomorpha Leporidae Black-tailed Jackrabbit Lepus californicus Lower risk Hidalgo and southern Queretaro to northern Sonora and Baja California, Mexico; north to southwestern Oregon and central Washington, southern Idaho, eastern Colorado, southern South Dakota, western Missouri, and northwestern Arkansas. Apparently isolated population in southwestern Montana. 060, 245, 1347 530       Sagebrush flats, overgrazed pastures and rangelands, deserts, prairies and agricultural lands. Nocturnal or crepuscular; rests by day in a shallow soil depression, usually in the shade of a bush. Uses speed and agility to avoid predators; usually solitary, but may be seen in pairs or larger groups.    
Lagomorpha Leporidae White-tailed Jackrabbit Lepus townsendii Lower risk Central Alberta and Saskatchewan east to extreme southwestern Ontario, Canada, south to southwestern Wisconsin, Iowa, northwestern Missouri, west through central Kansas to north central New Mexico, west to central Nevada, east central California, US, and north to south central British Columbia, Canada. 1189, 1349 288       Open grasslands, meadows and cultivated areas; less common in sagebrush flats. Mainly nocturnal, but may be active at dawn or dusk.  When pursued, follows a zigzag path with big leaps and bursts of speed.    
Lagomorpha Leporidae Desert Rabbit Sylvilagus audubonii Lower Risk Northeastern Puebla and western Veracruz, Mexico, to north central Montana and southwestern North Dakota, north central Utah, central Nevada, and northcentral California, south to Baja California and central Sinaloa, Mexico. 059, 1188, 1858 106       Habitat is varied, maily in dry lowlands including deserts, grasslands, riparian brush and pinon-juniper woodlands. Most active soon after dawn or at dusk. Retreats from heat of day into burrows made by another species or a shady thicket.    
Lagomorpha Leporidae Mountain Cottontail Sylvilagus nuttallii Lower Risk Intermountain area of North America from southern British Columbia to southern Saskatchewan, Canada, south to eastern California, Nevada, central Arizona and NW New Mexico.   56       Lives in rocky areas in sagebrush flats, riparian areas and gullies near ponderosa pines or spruces. Most active at dawn or dusk. Unlike most rabbits, sometimes climbs trees.    
Soricomorpha Soricidae Crawford's grey shrew Notiosorex crawfordi Least concern Southwestern andsouthcentral United States to Baja California.   17              
Soricomorpha Soricidae Merriam's shrew Sorex merriami Least concern Western United States.   2         Strong preference for dry habitats.    
Soricomorpha Soricidae Dusky shrew Sorex monticolus Least concern Much of Alaska south to northern Mexico.  Pacific coast east to the northern Great Plains.   528         Also known as the Montane shrew.    
Soricomorpha Soricidae Water shrew Sorex palustris Least concern Southern Alaska and the northern and mountainous areas of the United States. 1287 296              
Soricomorpha Soricidae Preble's shrew Sorex preblei Least concern Northwestern United States.   416              
Soricomorpha Soricidae Inyo shrew Sorex tenellus Least concern Mountain areas of California and Nevada.   131              
Soricomorpha Soricidae Vagrant shrew Sorex vagrans Least concern Along the Pacific coast to central coastal California, throughout Oregon and Washington, western Montana, western and southern Idaho, Northern and east central Nevada, northern and extreme west central Utah, and extremem western Wyoming. 1288 744              
Soricomorpha Talpidae Broad-footed mole Scapanus latimanus Least concern South central Oregon to northern Baja California and Mexico.   666         Makes temporary foraging tunnels just below the soil surface, leaving a visible ridge in the soil. Feeds mainly on earthworms. Favors rich damp soils with little vegetation; avoids heavy clay or stony soils.    
Lagomorpha Ochotonidae Pika Ochotona princeps common   63, 64 352