There are at least 18 large mammal and 103 small mammal

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

known to occur in

Wyoming Wyoming () is a state in the Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the southwest, and Colorado to the s ...

. Species are listed by common name, scientific name, typical habitat and occurrence. The common and scientific names come from the American Society of Mammalogists' Wyoming Mammal List.

Large and medium sized mammals

Grizzly bear

Order: Carnivora, Family:

Ursidae Bears are carnivoran mammals of the family Ursidae. They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats throughout the Nort ...

Black bear Black bear or Blackbear may refer to: Animals * American black bear (''Ursus americanus''), a North American bear species * Asian black bear (''Ursus thibetanus''), an Asian bear species Music * Black Bear (band), a Canadian First Nations group ...

Canadian Rockies - the bear at Lake Louise

Order: Carnivora, Family:

Occurrence: Forests, slide areas, alpine meadows The American black bear (''Ursus americanus'') is North America's smallest and most common species of bear. It is a generalist animal, being able to exploit numerous different habitats and foodstuffs. The American black bear is listed by the IUCN as being of

least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

, due to the species widespread distribution and a large global population estimated to be twice that of all other bear species combined.

Bighorn sheep The bighorn sheep (''Ovis canadensis'') is a species of sheep native to North America. It is named for its large horns. A pair of horns might weigh up to ; the sheep typically weigh up to . Recent genetic testing indicates three distinct subspec ...

Order:

Artiodactyla The even-toed ungulates (Artiodactyla , ) are ungulates—hoofed animals—which bear weight equally on two (an even number) of their five toes: the third and fourth. The other three toes are either present, absent, vestigial, or pointing poster ...

, Family:

Bovidae The Bovidae comprise the biological family of cloven-hoofed, ruminant mammals that includes cattle, bison, buffalo, antelopes, and caprines. A member of this family is called a bovid. With 143 extant species and 300 known extinct species, t ...

Occurrence: Open mountainous areas The bighorn sheep (''Ovis canadensis'') is a species of sheep in North America with large horns. The horns can weigh up to , while the sheep themselves weigh up to .

American bison The American bison (''Bison bison'') is a species of bison native to North America. Sometimes colloquially referred to as American buffalo or simply Bubalina, buffalo (a different clade of bovine), it is one of two extant species of bison, alongs ...

Order:

, Family:

Occurrence: Eastside parklands and prairies The American bison (''Bison bison'') is a North American species of bison, also commonly known as the American buffalo. These bison once roamed the

grassland A grassland is an area where the vegetation is dominated by grasses ( Poaceae). However, sedge ( Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur na ...

s of North America in massive herds; their range roughly formed a triangle between the

Great Bear Lake Great Bear Lake ( den, Sahtú; french: Grand lac de l'Ours) is a lake in the boreal forest of Canada. It is the largest lake entirely in Canada (Lake Superior and Lake Huron are larger but straddle the Canada–US border), the fourth-largest ...

in Canada's far northwest, south to the Mexican states of Durango and Nuevo León, and east along the western boundary of the

Appalachian Mountains The Appalachian Mountains, often called the Appalachians, (french: Appalaches), are a system of mountains in eastern to northeastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period. They ...

. Today these bison are much fewer in number, and travel only in small herds. In 1985, the American bison was declared the state mammal of Wyoming.

Bobcat

Order: Carnivora, Family: Felidae Occurrence: Open forests, brushy areas The bobcat (''Lynx rufus'') is a North American mammal of the cat family, Felidae. With twelve recognized subspecies, it ranges from southern Canada to northern Mexico, including most of the

continental United States The contiguous United States (officially the conterminous United States) consists of the 48 adjoining U.S. states and the Federal District of the United States of America. The term excludes the only two non-contiguous states, Alaska and Hawaii ...

. The bobcat is an adaptable

predator Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill th ...

that inhabits wooded areas, as well as semi-desert, urban edge, forest edges and swampland environments. It persists in much of its original range and populations are healthy.

Coyote

Order: Carnivora, Family: Canidae Occurrence: Forests, grasslands The coyote ( or ) (''Canis latrans''), also known as the American

jackal Jackals are medium-sized canids native to Africa and Eurasia. While the word "jackal" has historically been used for many canines of the subtribe canina, in modern use it most commonly refers to three species: the closely related black-backed ...

or the prairie wolf, is a species of

canid Canidae (; from Latin, '' canis'', " dog") is a biological family of dog-like carnivorans, colloquially referred to as dogs, and constitutes a clade. A member of this family is also called a canid (). There are three subfamilies found withi ...

found throughout North and

Central America Central America ( es, América Central or ) is a subregion of the Americas. Its boundaries are defined as bordering the United States to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. ...

, ranging from

Panama Panama ( , ; es, link=no, Panamá ), officially the Republic of Panama ( es, República de Panamá), is a transcontinental country spanning the southern part of North America and the northern part of South America. It is bordered by Co ...

in the south, north through Mexico, the United States and Canada. It occurs as far north as

Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...

and all but the northernmost portions of Canada.

Elk

Order:

, Family:

Cervidae Deer or true deer are hoofed ruminant mammals forming the family Cervidae. The two main groups of deer are the Cervinae, including the muntjac, the elk (wapiti), the red deer, and the fallow deer; and the Capreolinae, including the reind ...

Occurrence: Open forests, meadows, fields The elk or wapiti (''Cervus canadensis'') is one of the largest species of

deer Deer or true deer are hoofed ruminant mammals forming the family Cervidae. The two main groups of deer are the Cervinae, including the muntjac, the elk (wapiti), the red deer, and the fallow deer; and the Capreolinae, including the re ...

in the world and one of the largest mammals in North America and eastern Asia. In the deer family (

), only the

moose The moose (in North America) or elk (in Eurasia) (''Alces alces'') is a member of the New World deer subfamily and is the only species in the genus ''Alces''. It is the largest and heaviest extant species in the deer family. Most adult ma ...

, ''Alces alces'' (called an "elk" in Europe), is larger, and '' Cervus unicolor'' (the sambar deer) can rival the ''C. canadensis'' elk in size. Elk range in forest and forest-edge habitat, feeding on grasses, plants, leaves, and bark.

Gray fox The gray fox (''Urocyon cinereoargenteus''), or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America. This species and its only congener, the diminutive island fox (''Urocyon littor ...

Order: Carnivora, Family: Canidae Occurrence: Deciduous forests, cottonwood riparian, basin-prairie shrublands, sagebrush-grasslands, riparian shrub, grasslands, agricultural areas, rock outcrops, roadside/railroad banks. The gray fox (''Urocyon cinereoargenteus'') ranges throughout most of the southern half of North America from southern Canada to the northern part of South America (

Venezuela Venezuela (; ), officially the Bolivarian Republic of Venezuela ( es, link=no, República Bolivariana de Venezuela), is a country on the northern coast of South America, consisting of a continental landmass and many islands and islets in th ...

and Colombia).

Gray wolf

Order: Carnivora, Family: Canidae Occurrence: Coniferous forests The gray wolf (''Canis lupus''), often known simply as the wolf, is the largest wild member of the family Canidae. It is an

ice age An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and gre ...

survivor originating during the Late Pleistocene around 300,000 years ago. DNA sequencing and

genetic drift Genetic drift, also known as allelic drift or the Wright effect, is the change in the frequency of an existing gene variant (allele) in a population due to random chance. Genetic drift may cause gene variants to disappear completely and there ...

studies reaffirm that the gray wolf shares a common ancestry with the

domestic dog The dog (''Canis familiaris'' or ''Canis lupus familiaris'') is a domesticated descendant of the wolf. Also called the domestic dog, it is Domestication of the dog, derived from the extinct Pleistocene wolf, and the modern wolf is the dog's n ...

(''Canis lupus familiaris''). Although certain aspects of this conclusion have been questioned, the main body of evidence confirms it. A number of other gray wolf subspecies have been identified, though the actual number of subspecies is still open to discussion. Gray wolves are typically

apex predator An apex predator, also known as a top predator, is a predator at the top of a food chain, without natural predators of its own. Apex predators are usually defined in terms of trophic dynamics, meaning that they occupy the highest trophic lev ...

s in the

ecosystem An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the syste ...

s they occupy.

Canada lynx The Canada lynx (''Lynx canadensis''), or Canadian lynx, is a medium-sized North American lynx that ranges across Alaska, Canada, and northern areas of the contiguous United States. It is characterized by its long, dense fur, triangular ears ...

Order: Carnivora, Family: Felidae Occurrence: Coniferous forests The Canada lynx (''Lynx canadensis'') is a North American mammal of the cat family, Felidae. It is a close relative of the

Eurasian lynx The Eurasian lynx (''Lynx lynx'') is a medium-sized wild cat widely distributed from Northern, Central and Eastern Europe to Central Asia and Siberia, the Tibetan Plateau and the Himalayas. It inhabits temperate and boreal forests up to an eleva ...

(''Lynx lynx''). Some authorities regard both as

conspecific Biological specificity is the tendency of a characteristic such as a behavior or a biochemical variation to occur in a particular species. Biochemist Linus Pauling stated that "Biological specificity is the set of characteristics of living organis ...

. However, in some characteristics the Canadian lynx is more like the bobcat (''Lynx rufus'') than the Eurasian lynx. With the recognized subspecies, it ranges across Canada and into Alaska as well as some parts of the northern United States.

Moose The moose (in North America) or elk (in Eurasia) (''Alces alces'') is a member of the New World deer subfamily and is the only species in the genus ''Alces''. It is the largest and heaviest extant species in the deer family. Most adult ma ...

Order:

, Family:

Occurrence: Coniferous forests, lakes, slow streams, marshy areas The moose (North America) or common European elk (Europe) (''Alces alces'') is the largest extant species in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

. Moose are distinguished by the palmate antlers of the males; other members of the family have antlers with a "twig-like" configuration. Moose typically inhabit boreal and mixed deciduous forests of the Northern Hemisphere in

temperate In geography, the temperate climates of Earth occur in the middle latitudes (23.5° to 66.5° N/S of Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout ...

to subarctic climates.

Mountain goat The mountain goat (''Oreamnos americanus''), also known as the Rocky Mountain goat, is a hoofed mammal endemic to mountainous areas of western North America. A subalpine to alpine species, it is a sure-footed climber commonly seen on cliffs an ...

Order:

, Family:

Occurrence: High peaks and meadows The mountain goat (''Oreamnos americanus''), also known as the Rocky Mountain goat, is a large-hoofed mammal found only in North America. Despite its vernacular name, it is not a member of ''

Capra Capra may refer to: * ''Capra'' (genus), comprising the goats * Capra (goat dance), a Romanian custom * Capra (titular see), a titular see in the Catholic Church * Capra (car), a pick-up brand from the Iranian Bahman Group People * Buzz Capra ...

'', the genus of true goats. It resides at high elevations and is a sure-footed climber, often resting on rocky cliffs that predators cannot reach. It has been introduced.

Mountain lion The cougar (''Puma concolor'') is a large cat native to the Americas. Its range spans from the Canadian Yukon to the southern Andes in South America and is the most widespread of any large wild terrestrial mammal in the Western Hemisphere. ...

Order: Carnivora, Family: Felidae Occurrence: Coniferous forests The cougar (''Puma concolor''), also known as puma, mountain lion, mountain cat, catamount or panther, depending on the region, is a mammal of the family Felidae, native to the

Americas The Americas, which are sometimes collectively called America, are a landmass comprising the totality of North and South America. The Americas make up most of the land in Earth's Western Hemisphere and comprise the New World. Along with th ...

. This large, solitary cat has the greatest

range Range may refer to: Geography * Range (geographic), a chain of hills or mountains; a somewhat linear, complex mountainous or hilly area (cordillera, sierra) ** Mountain range, a group of mountains bordered by lowlands * Range, a term used to i ...

of any large wild terrestrial mammal in the Western Hemisphere, extending from

Yukon Yukon (; ; formerly called Yukon Territory and also referred to as the Yukon) is the smallest and westernmost of Canada's three territories. It also is the second-least populated province or territory in Canada, with a population of 43,964 as ...

in Canada to the southern

Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...

of South America. An adaptable,

generalist A generalist is a person with a wide array of knowledge on a variety of subjects, useful or not. It may also refer to: Occupations * a physician who provides general health care, as opposed to a medical specialist; see also: ** General pract ...

species, the cougar is found in every major American

habitat In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical ...

type. It is the second heaviest cat in the American continents after the jaguar. Although large, the cougar is most closely related to smaller felines.

Mule deer The mule deer (''Odocoileus hemionus'') is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer. Unlike the related whi ...

Order:

, Family:

Occurrence: Open forests, meadows, often at high elevations The mule deer (''Odocoileus hemionus'') is a

whose habitat is in the western half of North America. It gets its name from its large mule-like ears. Adult male mule deer are called ''bucks'', adult females are called ''does'', and young of both sexes are called ''fawns''. The

black-tailed deer Two forms of black-tailed deer or blacktail deer that occupy coastal woodlands in the Pacific Northwest of North America are subspecies of the mule deer (''Odocoileus hemionus''). They have sometimes been treated as a species, but virtually all r ...

is considered by some a distinct species though it is classified as a subspecies of the mule deer. Unlike its cousin, the

white-tailed deer The white-tailed deer (''Odocoileus virginianus''), also known as the whitetail or Virginia deer, is a medium-sized deer native to North America, Central America, and South America as far south as Peru and Bolivia. It has also been introduced t ...

, mule deer are generally more associated with the land west of the Missouri River. The most noticeable differences between whitetails and mule deer are the color of their tails and configuration of their antlers. The mule deer's tail is black tipped.

Pronghorn The pronghorn (, ) (''Antilocapra americana'') is a species of artiodactyl (even-toed, hoofed) mammal indigenous to interior western and central North America. Though not an antelope, it is known colloquially in North America as the American a ...

Order:

, Family:

Antilocapridae The Antilocapridae are a family of artiodactyls endemic to North America. Their closest extant relatives are the giraffids with which they comprise the superfamily Giraffoidea. Only one species, the pronghorn (''Antilocapra americana''), is ...

Occurrence: Basin-prairie and mountain-foothills, shrublands, eastern great plains and great basin-foothills grasslands, sagebrush-grasslands The pronghorn (''Antilocapra americana''), is a species of

artiodactyl The even-toed ungulates (Artiodactyla , ) are ungulates—hoofed animals—which bear weight equally on two (an even number) of their five toes: the third and fourth. The other three toes are either present, absent, vestigial, or pointing poster ...

mammal native to interior western and central North America. Though not a true antelope, it is often known colloquially in North America as the prong buck, pronghorn antelope or simply antelope, as it closely resembles the true antelopes of the Old World and fills a similar ecological niche due to

convergent evolution Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last com ...

. It is the only surviving member of the family

.Smithsonian Institution. North American Mammals
Pronghorn ''Antilocapra americana''
/ref>

Red fox

Order: Carnivora, Family: Canidae Occurrence: Grasslands, open forest The red fox (''Vulpes vulpes'') is a small

native to much of North America and

Eurasia Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelago ...

, as well as northern Africa. It is the most recognizable species of

fox Foxes are small to medium-sized, omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull, upright, triangular ears, a pointed, slightly upturned snout, and a long bushy tail (or ''brush''). Twelve sp ...

and in many areas it is referred to simply as "the fox". As its name suggests, its fur is predominantly reddish brown, but there is a naturally occurring gray morph known as the "silver" fox. The red fox is by far the most widespread and abundant species of

, found in almost every single habitat in the Northern Hemisphere, from the

coastal marsh A tidal marsh (also known as a type of "tidal wetland") is a marsh found along rivers, coasts and estuaries which floods and drains by the tidal movement of the adjacent estuary, sea or ocean. Tidal marshes are commonly zoned into lower marshes ( ...

es of United States, to the alpine tundras of

Tibetan Plateau The Tibetan Plateau (, also known as the Qinghai–Tibet Plateau or the Qing–Zang Plateau () or as the Himalayan Plateau in India, is a vast elevated plateau located at the intersection of Central, South and East Asia covering most of the ...

Swift fox The swift fox (''Vulpes velox'') is a small light orange-tan fox around the size of a domestic cat found in the western grasslands of North America, such as Montana, Colorado, New Mexico, Kansas, Oklahoma and Texas. It also lives in southern M ...

Order: Carnivora, Family: Canidae Occurrence: Short-grass prairies and deserts The swift fox (''Vulpes velox'') is a small light orange-tan

around the size of a domestic cat found in the western grasslands of North America, such as

Colorado Colorado (, other variants) is a state in the Mountain states, Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the wes ...

New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ke ...

and

Texas Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...

. It also lives in

Manitoba , image_map = Manitoba in Canada 2.svg , map_alt = Map showing Manitoba's location in the centre of Southern Canada , Label_map = yes , coordinates = , capital = Winn ...

Saskatchewan Saskatchewan ( ; ) is a province in western Canada, bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and on the south by the U.S. states of Montana and North Dak ...

and

Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Ter ...

in Canada, where it was previously

extirpated Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinct ...

. It is closely related to the

kit fox The kit fox (''Vulpes macrotis'') is a fox species that inhabits arid and semi-arid regions of the southwestern United States and northern and central Mexico. These foxes are the smallest of the four species of ''Vulpes'' occurring in North Amer ...

and the two species are sometimes known as subspecies of ''Vulpes velox'' because hybrids of the two species occur naturally where their ranges overlap. The swift fox lives primarily in short-grass prairies and deserts. Due to predator control programs in the 1930s, it was considered extinct in Canada for some time, but reintroduction programs have been successful in reintroducing the species. Due to stable populations elsewhere, the species is considered by the IUCN to be of least concern.

White-tailed deer The white-tailed deer (''Odocoileus virginianus''), also known as the whitetail or Virginia deer, is a medium-sized deer native to North America, Central America, and South America as far south as Peru and Bolivia. It has also been introduced t ...

Order:

, Family:

Occurrence: Coniferous forests, meadows, creek and river bottoms The white-tailed deer (''Odocoileus virginianus''), also known as the Virginia deer, or simply as the whitetail, is a medium-sized

native to the United States (all but five of the states), Canada, Mexico,

, and in South America as far south as

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = National seal , national_motto = "Firm and Happy f ...

. The species is most common east of the

Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in straight-line distance from the northernmost part of western Canada, to New Mexico ...

, and is absent from much of the

western United States The Western United States (also called the American West, the Far West, and the West) is the region comprising the westernmost states of the United States. As American settlement in the U.S. expanded westward, the meaning of the term ''the We ...

, including

Nevada Nevada ( ; ) is a state in the Western region of the United States. It is bordered by Oregon to the northwest, Idaho to the northeast, California to the west, Arizona to the southeast, and Utah to the east. Nevada is the 7th-most extensive, ...

Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it ...

California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only state ...

, and

(though its close relatives, the

mule deer The mule deer (''Odocoileus hemionus'') is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer. Unlike the related whi ...

and

, can be found there). It does, however, survive in

aspen parkland Aspen parkland refers to a very large area of transitional biome between prairie and boreal forest in two sections, namely the Peace River Country of northwestern Alberta crossing the border into British Columbia, and a much larger area stretchi ...

s and deciduous river bottomlands within the central and northern Great Plains, and in mixed

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, ...

riparian A riparian zone or riparian area is the interface between land and a river or stream. Riparian is also the proper nomenclature for one of the terrestrial biomes of the Earth. Plant habitats and communities along the river margins and banks a ...

corridors, river valley bottomlands, and lower foothills of the northern

Rocky Mountain The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in straight-line distance from the northernmost part of western Canada, to New Mexico in ...

regions from Wyoming to southeastern

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

Small mammals

Procyonids

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order: Carnivora, Family: Procyonidae * Ringtail, ''Bassariscus astutus'' *

Raccoon The raccoon ( or , ''Procyon lotor''), sometimes called the common raccoon to distinguish it from other species, is a mammal native to North America. It is the largest of the procyonid family, having a body length of , and a body weight of ...

, ''Procyon lotor'', open forests, stream bottoms

Badgers and weasels

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Mustela Erminea head

Order: Carnivora, Family:

Mustelidae The Mustelidae (; from Latin ''mustela'', weasel) are a family of carnivorous mammals, including weasels, badgers, otters, ferrets, martens, minks and wolverines, among others. Mustelids () are a diverse group and form the largest family in th ...

Wolverine The wolverine (), (''Gulo gulo''; ''Gulo'' is Latin for " glutton"), also referred to as the glutton, carcajou, or quickhatch (from East Cree, ''kwiihkwahaacheew''), is the largest land-dwelling species of the family Mustelidae. It is a muscul ...

, ''Gulo gulo'', coniferous forests and alpine meadows *

North American river otter The North American river otter (''Lontra canadensis''), also known as the northern river otter and river otter, is a semiaquatic mammal that only lives on the North American continent, along its waterways and coasts. An adult North American rive ...

, ''Lontra canadensis'', rivers, lakes, ponds *

Pacific marten The Pacific marten (''Martes caurina'') is a species of North American mammal, a member of the family Mustelidae. It is found throughout western North America. Taxonomy The species was formerly considered conspecific with the American marten ...

, ''Martes caurina'', coniferous forests * Black-footed ferret, ''Mustela nigripes'' * Least weasel, ''Mustela nivalis'', open forests and grasslands * American ermine, ''Mustela richardsonii'', coniferous forests and meadows *

Long-tailed weasel The long-tailed weasel (''Neogale frenata''), also known as the bridled weasel, masked ermine, or big stoat, is a species of mustelid distributed from southern Canada throughout all the United States and Mexico, southward through all of Central A ...

, ''Neogale frenata'', open forests and meadows *

American mink The American mink (''Neogale vison'') is a semiaquatic species of mustelid native to North America, though human intervention has expanded its range to many parts of Europe, Asia and South America. Because of range expansion, the American mink i ...

, ''Neogale vison'', creek and lake edges *

Fisher Fisher is an archaic term for a fisherman, revived as gender-neutral. Fisher, Fishers or The Fisher may also refer to: Places Australia *Division of Fisher, an electoral district in the Australian House of Representatives, in Queensland *Elect ...

, ''Pekania pennanti'', coniferous forests *

American badger The American badger (''Taxidea taxus'') is a North American badger similar in appearance to the European badger, although not closely related. It is found in the western, central, and northeastern United States, northern Mexico, and south-cent ...

, ''Taxidea taxus'', grasslands

Skunks

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Spilogale gracilis

Order: Carnivora, Family:

Mephitidae Mephitidae is a family of mammals comprising the skunks and stink badgers. They are noted for the great development of their anal scent glands, which they use to deter predators. Skunks were formerly classified as a subfamily of the Mustelidae ...

* Striped skunk, ''Mephitis mephitis'', open forests and grasslands *

Western spotted skunk The western spotted skunk (''Spilogale gracilis'') is a spotted skunk of western North America. Description With a total length of , the western spotted skunk is smaller than the striped skunk (''Mephitis mephitis''). Males, which weigh , are s ...

, ''Spilogale gracilis'' *

Eastern spotted skunk The eastern spotted skunk (''Spilogale putorius'') is a small, relatively slender skunk found in North America, throughout the eastern United States and in small areas of Canada and Mexico. This small skunk is more weasel-like in body shape tha ...

, ''Spilogale putorius''

Hares and rabbits

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Sylvilagus audubonii 2

Order:

Lagomorpha The lagomorphs are the members of the taxonomic order Lagomorpha, of which there are two living families: the Leporidae (hares and rabbits) and the Ochotonidae ( pikas). The name of the order is derived from the Ancient Greek ''lagos'' (λαγ ...

, Family:

Leporidae Leporidae is the family of rabbits and hares, containing over 60 species of extant mammals in all. The Latin word ''Leporidae'' means "those that resemble ''lepus''" (hare). Together with the pikas, the Leporidae constitute the mammalian order ...

Pygmy rabbit The pygmy rabbit (''Brachylagus idahoensis'') is a rabbit species native to the United States. It is also the only native rabbit species in North America to dig its own burrow. The pygmy rabbit differs significantly from species within either ...

, ''Brachylagus idahoensis'' *

Snowshoe hare The snowshoe hare (''Lepus americanus''), also called the varying hare or snowshoe rabbit, is a species of hare found in North America. It has the name "snowshoe" because of the large size of its hind feet. The animal's feet prevent it from sin ...

, ''Lepus americanus'', coniferous forests *

Black-tailed jackrabbit The black-tailed jackrabbit (''Lepus californicus''), also known as the American desert hare, is a common hare of the western United States and Mexico, where it is found at elevations from sea level up to . Reaching a length around , and a ...

, ''Lepus californicus'' *

White-tailed jackrabbit The white-tailed jackrabbit (''Lepus townsendii''), also known as the prairie hare and the white jack, is a species of hare found in western North America. Like all hares and rabbits, it is a member of the family Leporidae of order Lagomorpha ...

, ''Lepus townsendii'', grasslands *

Desert cottontail The desert cottontail (''Sylvilagus audubonii''), also known as Audubon's cottontail, is a New World cottontail rabbit, and a member of the family Leporidae. Unlike the European rabbit (''Oryctolagus cuniculus''), they do not form social burrow s ...

, ''Sylvilagus audubonii'' *

Eastern cottontail The eastern cottontail (''Sylvilagus floridanus'') is a New World cottontail rabbit, a member of the family Leporidae. It is the most common rabbit species in North America. Distribution The eastern cottontail can be found in meadows and shrubb ...

, ''Sylvilagus floridanus'' * Mountain cottontail, ''Sylvilagus nuttallii'', forests, brushy areas

Pikas

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order:

, Family: Ochotonidae *

American pika The American pika (''Ochotona princeps''), a diurnal species of pika, is found in the mountains of western North America, usually in boulder fields at or above the tree line. They are herbivorous, smaller relatives of rabbits and hares. Pikas ...

, ''Ochotona princeps'', rocky slopes

Shrews

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': MaskedShrew23

Order:

Eulipotyphla Eulipotyphla (, which means "truly fat and blind") is an order of mammals suggested by molecular methods of phylogenetic reconstruction, which includes the laurasiatherian members of the now-invalid polyphyletic order Lipotyphla, but not the ...

, Family: Soricidae * Masked shrew, ''Sorex cinereus'', coniferous forests, meadows, ponds and stream edges * Hayden's shrew, ''Sorex haydeni'' * Pygmy shrew, ''Sorex hoyi'', dry open coniferous forests * Merriam's shrew, ''Sorex merriami'' * Dusky shrew, ''Sorex monticolus'', higher elevation coniferous forests * Dwarf shrew, ''Sorex nanus'' * American water shrew, ''Sorex palustris'', stream edges * Preble's shrew, ''Sorex preblei'' *

Vagrant shrew The vagrant shrew (''Sorex vagrans''), also known as the wandering shrew, is a medium-sized North American shrew. At one time, the montane shrew and the Orizaba long-tailed shrew were considered to belong to the same species. Range and habitat ...

, ''Sorex vagrans'', moist forests and grasslands, marsh and stream edges

Beaver

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order:

Rodent Rodents (from Latin , 'to gnaw') are mammals of the order Rodentia (), which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammal species are rodents. They are n ...

ia, Family:

Castoridae The family Castoridae contains the two living species of beavers and their fossil relatives. A highly diverse group of rodents within this family once roamed the earth, but only a single genus is extant today, '' Castor''. Characteristics Ca ...

* Beaver, ''Castor canadensis'', ponds, streams, lakes

Squirrels

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order:

ia, Family:

Sciuridae Squirrels are members of the family Sciuridae, a family that includes small or medium-size rodents. The squirrel family includes tree squirrels, ground squirrels (including chipmunks and prairie dogs, among others), and flying squirrels. Squ ...

White-tailed prairie dog The white-tailed prairie dog (''Cynomys leucurus'') is found in western Wyoming and western Colorado with small areas in eastern Utah and southern Montana. The largest populations are in Wyoming where they are known colloquially as "chiselers ...

, ''Cynomys leucurus'' *

Black-tailed prairie dog The black-tailed prairie dog (''Cynomys ludovicianus'') is a rodent of the family Sciuridae found in the Great Plains of North America from about the United States-Canada border to the United States-Mexico border. Unlike some other prairie dogs, ...

, ''Cynomys ludovicianus'' *

Northern flying squirrel The northern flying squirrel (''Glaucomys sabrinus'') is one of three species of the genus '' Glaucomys'', the only flying squirrels found in North America.Walker EP, Paradiso JL. 1975. ''Mammals of the World''. Baltimore: Johns Hopkins Universit ...

, ''Glaucomys sabrinus'', coniferous forests, nocturnal *

Yellow-bellied marmot The yellow-bellied marmot (''Marmota flaviventris''), also known as the rock chuck, is a large, stout-bodied ground squirrel in the marmot genus. It is one of fourteen species of marmots, and is native to mountainous regions of southwestern Cana ...

, ''Marmota flaviventris'', open rocky foothills, talus slopes *

Abert's squirrel Abert's squirrel or the tassel-eared squirrel (''Sciurus aberti'') is a tree squirrel in the genus ''Sciurus'' native to the southern Rocky Mountains from the United States to the northern Sierra Madre Occidental of Mexico, with concentrations fo ...

, ''Sciurus aberti'' *

Eastern fox squirrel The fox squirrel (''Sciurus niger''), also known as the eastern fox squirrel or Bryant's fox squirrel, is the largest species of tree squirrel native to North America. Despite the differences in size and coloration, it is sometimes mistaken for ...

, ''Sciurus niger'' *

Uinta ground squirrel The Uinta ground squirrel (''Urocitellus armatus''), commonly called a "chisler" and ''Potgut'' in northern Utah,Noble, Katie"Animal of the Week: What is a Potgut?" ''The Green Life'', 13 April 2011. Retrieved 24 February 2019. is a species of rod ...

, ''Spermophilus armatus'' *

Wyoming ground squirrel The Wyoming ground squirrel (''Urocitellus elegans'') is a species of rodent in the family Sciuridae. It is endemic to the Northwestern United States The Northwestern United States, also known as the American Northwest or simply the Northwe ...

, ''Spermophilus elegans'' * Golden-mantled ground squirrel, ''Spermophilus lateralis'', high open forests, rocky areas *

Spotted ground squirrel The spotted ground squirrel (''Xerospermophilus spilosoma'') is a species of ground squirrel in the rodent family Sciuridae. It is found throughout Mexico and the central and western United States. Characterized by a white spotted back, the spott ...

, ''Spermophilus spilosoma'' *

Thirteen-lined ground squirrel The thirteen-lined ground squirrel (''Ictidomys tridecemlineatus''), also known as the striped gopher, leopard ground squirrel, squinney, (formerly known as the leopard-spermophile in the age of Audubon), is a ground squirrel that is widely dis ...

, ''Spermophilus tridecemlineatus'', grasslands * Yellow-pine chipmunk, ''Tamias amoenus'', open forests, brushy, rocky areas *

Cliff chipmunk The cliff chipmunk (''Neotamias dorsalis'') is a small, bushy-tailed squirrel that typically lives along cliff walls or boulder fields bordering Pinyon-juniper woodlands in the Western United States and Mexico (commonly spotted in northern Arizo ...

, ''Tamias dorsalis'' *

Least chipmunk The least chipmunk (''Neotamias minimus'') is the smallest species of chipmunk and the most widespread in North America. Description It is the smallest species of chipmunk, measuring about in total length with a weight of . The body is gray to ...

, ''Tamias minimus'', high open forests, brushy, rocky areas, alpine meadows *

Uinta chipmunk The Uinta chipmunk or hidden forest chipmunk (''Neotamias umbrinus''), is a species of chipmunk in the family Sciuridae. It is endemic to the United States. Formerly known as ''Tamias umbrinus'', phylogenetic studies have shown it to be sufficie ...

, ''Tamias umbrinus'' * Red squirrel, ''Tamiasciurus hudsonicus''

Pocket mice and kangaroo rats

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order:

ia, Family:

Heteromyidae Heteromyidae is a family of rodents consisting of kangaroo rats, kangaroo mice, pocket mice and spiny pocket mice. Most heteromyids live in complex burrows within the deserts and grasslands of western North America, though species within th ...

* Plains pocket mouse, ''Perognathus flavescens'' * Great Basin pocket mouse, ''Perognathus parvus'' *

Hispid pocket mouse The hispid pocket mouse (''Chaetodipus hispidus'') is a large pocket mouse native to the Great Plains region of North America. It is a member of the genus ''Chaetodipus''. Distribution The hispid pocket mouse occurs across the Great Plains fro ...

, ''Chaetodipus hispidus'' * Olive-backed pocket mouse, ''Perognathus fasciatus'' *

Ord's kangaroo rat Ord's kangaroo rat (''Dipodomys ordii'') is a kangaroo rat native to western North America, specifically the Great Plains and the Great Basin, with its range extending from extreme southern Canada to central Mexico. Ord's kangaroo rat has a fift ...

, ''Dipodomys ordii'' * Silky pocket mouse, ''Perognathus flavus''

Pocket gophers

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order:

ia, Family: Geomyidae * Northern pocket gopher, ''Thomomys talpoides'', meadows *

Idaho pocket gopher The Idaho pocket gopher (''Thomomys idahoensis'') is a species of rodent in the family Geomyidae. It is rather small, with a lightly built skull. Its fur color varies through the body and between individuals. Found in the western United States, ...

, ''Thomomys idahoensis'' * Wyoming pocket gopher, ''Thomomys clusius'' *

Plains pocket gopher The plains pocket gopher (''Geomys bursarius'') is one of 35 species of pocket gophers, so named in reference to their externally located, fur-lined cheek pouches. They are burrowing animals, found in grasslands and agricultural land across the ...

, ''Geomys bursarius''

Mice

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Peromyscus maniculatus

Order:

ia, Family:

Cricetidae The Cricetidae are a family of rodents in the large and complex superfamily Muroidea. It includes true hamsters, voles, lemmings, muskrats, and New World rats and mice. At almost 608 species, it is the second-largest family of mammals, and h ...

Western deer mouse The western deermouse or western deer mouse (''Peromyscus sonoriensis'') is a rodent native to North America. It is widespread throughout the western half of the continent, mainly in areas west of the Mississippi River. Taxonomy It was former ...

, ''Peromyscus sonoriensis'', forests, grasslands, alpine meadows *

Northern grasshopper mouse The northern grasshopper mouse (''Onychomys leucogaster'') is a North American carnivorous rodent of the family Cricetidae. It ranges over much of the western part of the continent, from southern Saskatchewan and central Washington to Tamaulipas ...

, ''Onychomys leucogaster'' * Western harvest mouse, ''Reithrodontomys megalotis'' *

Plains harvest mouse The plains harvest mouse (''Reithrodontomys montanus'') is a species of rodent in the family Cricetidae. It is found in northern Mexico and the central United States The United States of America (U.S.A. or USA), commonly known as the Uni ...

, ''Reithrodontomys montanus'' *

White-footed mouse The white-footed mouse (''Peromyscus leucopus'') is a rodent native to North America from Ontario, Quebec, Labrador, and the Maritime Provinces (excluding the island of Newfoundland) to the southwestern United States and Mexico. In the Maritimes, ...

, ''Peromyscus leucopus'' *

Pinyon mouse The pinyon mouse (''Peromyscus truei'') is native to the southwestern United States and Baja California in Mexico. These medium-sized mice are often distinguished by their relatively large ears. The range of this species extends from southern ...

, ''Peromyscus truei'' * Canyon mouse, ''Peromyscus crinitus''

Jumping mice

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Order:

ia, Family:

Dipodidae Jerboas (from ar, جربوع ') are hopping desert rodents found throughout North Africa and Asia, and are members of the family Dipodidae. They tend to live in hot deserts. When chased, jerboas can run at up to . Some species are preyed on b ...

Western jumping mouse The western jumping mouse (''Zapus princeps''), is a species of rodent in the family Zapodidae. It is found in Canada and the United States. Western jumping mice evolved during the Pleistocene, possibly from the fossil species '' Zapus burti'', ...

, ''Zapus princeps'', grasslands, alpine meadows *

Meadow jumping mouse The meadow jumping mouse (''Zapus hudsonius'') is the most widely distributed mouse in the family Zapodidae. Its range extends from the Atlantic coast in the east to the Great Plains west, and from the arctic tree lines in Canada and Alaska to ...

, ''Zapus hudsonius''

Muskrats, voles and woodrats

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Muskrat swimming Ottawa

Order:

ia, Family:

* Muskrat, ''Ondatra zibethicus'', streams, lakes, marshy areas * Heather vole, ''Phenacomys intermedius'', coniferous forests, alpine meadows *

Long-tailed vole The long-tailed vole (''Microtus longicaudus''), in some areas known as the San Bernardino long-tailed vole, is a small vole found in western North America. They have short ears and a long tail. Their fur is gray brown with light gray underparts ...

, ''Microtus longicaudus'', coniferous forests, grasslands *

Meadow vole The eastern meadow vole (''Microtus pennsylvanicus''), sometimes called the field mouse or meadow mouse, is a North American vole found in eastern Canada and the United States. Its range extends farther south along the Atlantic coast. The west ...

, ''Microtus pennsylvanicus'', open forests, meadows, along streams, marshy areas * Southern red-backed vole, ''Clethrionomys gapperi'', coniferous forests * Water vole, ''Microtus richardsoni'', high elevation stream and lake edges *

Montane vole The montane vole (''Microtus montanus'') is a species of vole native to the western United States and Canada. Description Montane voles are medium-sized voles, with a total length of , including the tail. Adults typically weigh anything from , ...

, ''Microtus montanus'' *

Prairie vole The prairie vole (''Microtus ochrogaster'') is a small vole found in central North America. The vole has long, coarse grayish-brown fur on the upper portion of the body and yellowish fur on the lower portion of the body. It has short ears and a ...

, ''Microtus ochrogaster'' * Sagebrush vole, ''Lemmiscus curtatus'' *

Bushy-tailed woodrat The bushy-tailed woodrat, or packrat (''Neotoma cinerea'') is a species of rodent in the family Cricetidae found in Canada and the United States. Its natural habitats are boreal forests, temperate forests, dry savanna, temperate shrubland, and t ...

, ''Neotoma cinerea'', rocky areas, old buildings

Porcupines

Order:

ia, Family: Erethizontidae *

North American porcupine The North American porcupine (''Erethizon dorsatum''), also known as the Canadian porcupine, is a large quill-covered rodent in the New World porcupine family. It is the second largest rodent in North America, after the North American beaver ('' ...

, ''Erethizon dorsatum'', coniferous forests

Bats

From the ''Atlas of Birds, Mammals, Amphibians, and Reptiles in Wyoming'': Big-eared-townsend-fledermaus

Order:

Chiroptera Bats are mammals of the order Chiroptera.''cheir'', "hand" and πτερόν''pteron'', "wing". With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most bir ...

, Family:

Vespertilionidae Vespertilionidae is a family of microbats, of the order Chiroptera, flying, insect-eating mammals variously described as the common, vesper, or simple nosed bats. The vespertilionid family is the most diverse and widely distributed of bat famili ...

Big brown bat The big brown bat (''Eptesicus fuscus'') is a species of vesper bat distributed widely throughout North America, the Caribbean, and the northern portion of South America. It was first described as a species in 1796. Compared to other microbat ...

, ''Eptesicus fuscus'', coniferous forests, often around buildings, caves *

Hoary bat The hoary bat (''Lasiurus cinereus'') is a species of bat in the vesper bat family, Vespertilionidae. It lives throughout most of North America (possibly including Hawaii, although this is disputed). Taxonomy The hoary bat was described as a ...

, ''Lasiurus cinereus'', coniferous forests, mostly nocturnal *

Little brown bat The little brown bat or little brown myotis (''Myotis lucifugus'') is an endangered species of mouse-eared microbat found in North America. It has a small body size and glossy brown fur. It is similar in appearance to several other mouse-ea ...

, ''Myotis lucifugus'', coniferous forests, often around buildings, caves, nocturnal *

Long-eared myotis The long-eared myotis (''Myotis evotis'') is a species of vesper bat in the suborder Microchiroptera. It can be found in western Canada, the western United States, and Baja California in Mexico. Description The long-eared myotis is a pale brown ...

, ''Myotis evotis'', coniferous forests, meadows, nocturnal * Long-legged bat, ''Myotis volans'', coniferous forests, meadows, nocturnal *

Silver-haired bat The silver-haired bat (''Lasionycteris noctivagans'') is a solitary migratory species of vesper bat in the family Vespertilionidae and the only member of the genus ''Lasionycteris''. Etymology The species name translates as night-wandering, ref ...

, ''Lasionycteris noctivagans'', coniferous forests, meadows, nocturnal *

California myotis The California myotis (''Myotis californicus'') is a species of vesper bat. It is found in British Columbia in Canada, Guatemala, Mexico, and in the western United States, including California. Description The California myotis is a small (70– ...

, ''Myotis californicus'' *

Eastern red bat The eastern red bat (''Lasiurus borealis'') is a species of microbat in the family Vespertilionidae. Eastern red bats are widespread across eastern North America, with additional records in Bermuda. Taxonomy and etymology It was described in 1 ...

, ''Lasiurus borealis'' * Fringed myotis, ''Myotis thysanodes'' * Northern myotis, ''Myotis septentrionalis'' * Pallid bat, ''Antrozous pallidus'' * Spotted bat, ''Euderma maculatum'' *

Townsend's big-eared bat Townsend's big-eared bat (''Corynorhinus townsendii'') is a species of vesper bat. Description Townsend's big-eared bat is a medium-sized bat (7-12 g)

, ''Corynorhinus townsendii'' * Western small-footed myotis, ''Myotis ciliolabrum'' * Yuma myotis, ''Myotis yumanensis'' *

Eastern pipistrelle The tricolored bat (''Perimyotis subflavus'') is a species of microbat native to eastern North America. Formerly known as the eastern pipistrelle, based on the incorrect belief that it was closely related to European ''Pipistrellus'' species, th ...

, ''Pipistrellus subflavus'' *

Brazilian free-tailed bat The Mexican free-tailed bat or Brazilian free-tailed bat (''Tadarida brasiliensis'') is a medium-sized bat native to the Americas, so named because its tail can be almost half its total length and is not attached to its uropatagium. It has been ...

, ''Tadarida brasiliensis'' * Big free-tailed bat, ''Nyctinomops macrotis''

Exotic species, not native to Wyoming

Small mammals

Eastern gray squirrel The eastern gray squirrel (''Sciurus carolinensis''), also known, particularly outside of North America, as simply the grey squirrel, is a tree squirrel in the genus ''Sciurus''. It is native to eastern North America, where it is the most prodi ...

, ''Sciurus carolinensis'' *

Virginia opossum The Virginia opossum (''Didelphis virginiana''), also known as the North American opossum, is the only opossum living north of Mexico, its range extending south into Central America. It is the northernmost marsupial in the world. In the United S ...

, ''Didelphis virginiana'' * House mouse, ''Mus musculus'' *

Norway rat The brown rat (''Rattus norvegicus''), also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat, Norwegian rat and Parisian rat, is a widespread species of common rat. One of the largest muroids, it is a brown o ...

, ''Rattus norvegicus''

Notes

{{Lists of mammals by U.S. state

Mammals Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur o ...

Large and medium sized mammals

Grizzly bear

Black bear Black bear or Blackbear may refer to: Animals * American black bear (''Ursus americanus''), a North American bear species * Asian black bear (''Ursus thibetanus''), an Asian bear species Music * Black Bear (band), a Canadian First Nations group ...

Bighorn sheep The bighorn sheep (''Ovis canadensis'') is a species of sheep native to North America. It is named for its large horns. A pair of horns might weigh up to ; the sheep typically weigh up to . Recent genetic testing indicates three distinct subspec ...

American bison The American bison (''Bison bison'') is a species of bison native to North America. Sometimes colloquially referred to as American buffalo or simply Bubalina, buffalo (a different clade of bovine), it is one of two extant species of bison, alongs ...

Bobcat

Coyote

Elk

Gray fox The gray fox (''Urocyon cinereoargenteus''), or grey fox, is an omnivorous mammal of the family Canidae, widespread throughout North America and Central America. This species and its only congener, the diminutive island fox (''Urocyon littor ...

Gray wolf

Canada lynx The Canada lynx (''Lynx canadensis''), or Canadian lynx, is a medium-sized North American lynx that ranges across Alaska, Canada, and northern areas of the contiguous United States. It is characterized by its long, dense fur, triangular ears ...

Moose The moose (in North America) or elk (in Eurasia) (''Alces alces'') is a member of the New World deer subfamily and is the only species in the genus ''Alces''. It is the largest and heaviest extant species in the deer family. Most adult ma ...

Mountain goat The mountain goat (''Oreamnos americanus''), also known as the Rocky Mountain goat, is a hoofed mammal endemic to mountainous areas of western North America. A subalpine to alpine species, it is a sure-footed climber commonly seen on cliffs an ...

Mountain lion The cougar (''Puma concolor'') is a large cat native to the Americas. Its range spans from the Canadian Yukon to the southern Andes in South America and is the most widespread of any large wild terrestrial mammal in the Western Hemisphere. ...

Mule deer The mule deer (''Odocoileus hemionus'') is a deer indigenous to western North America; it is named for its ears, which are large like those of the mule. Two subspecies of mule deer are grouped into the black-tailed deer. Unlike the related whi ...

Pronghorn The pronghorn (, ) (''Antilocapra americana'') is a species of artiodactyl (even-toed, hoofed) mammal indigenous to interior western and central North America. Though not an antelope, it is known colloquially in North America as the American a ...

Red fox

Swift fox The swift fox (''Vulpes velox'') is a small light orange-tan fox around the size of a domestic cat found in the western grasslands of North America, such as Montana, Colorado, New Mexico, Kansas, Oklahoma and Texas. It also lives in southern M ...

White-tailed deer The white-tailed deer (''Odocoileus virginianus''), also known as the whitetail or Virginia deer, is a medium-sized deer native to North America, Central America, and South America as far south as Peru and Bolivia. It has also been introduced t ...

Small mammals

Procyonids

Badgers and weasels

Skunks

Hares and rabbits

Pikas

Shrews

Beaver

Squirrels

Pocket mice and kangaroo rats

Pocket gophers

Mice

Jumping mice

Muskrats, voles and woodrats

Porcupines

Bats

Exotic species, not native to Wyoming

Small mammals

See also

Further reading

Notes