| Order | Family | Scientific Name | Common Name |
| Artiodactyla | Antilocapridae | Antilocapra americana | (Pronghorn) |
| Artiodactyla | Bovidae | Bison bison | (American Bison) |
| Artiodactyla | Bovidae | Ovis canadensis | (Bighorn Sheep) |
| Artiodactyla | Bovidae | Ovis dalli | (Dall's Sheep) |
| Artiodactyla | Bovidae | Oreamnos americanus | (Mountain Goat) |
| Artiodactyla | Bovidae | Ovibos moschatus | (Muskox) |
| Artiodactyla | Cervidae | Rangifer tarandus | (Caribou) |
| Artiodactyla | Cervidae | Cervus elaphus | (Elk) |
| Artiodactyla | Cervidae | Alces alces | (Moose) |
| Artiodactyla | Cervidae | Odocoileus hemionus | (Mule Deer) |
| Artiodactyla | Cervidae | Mazama americana | (Red Brocket) |
| Artiodactyla | Cervidae | Odocoileus virginianus | (White-tailed Deer) |
| Artiodactyla | Tayassuidae | Pecari tajacu | (Collared Peccary) |
| Artiodactyla | Tayassuidae | Tayassu pecari | (White-lipped Peccary) |
| Carnivora | Canidae | Alopex lagopus | (Arctic Fox) |
| Carnivora | Canidae | Urocyon cinereoargenteus | (Common Gray Fox) |
| Carnivora | Canidae | Canis latrans | (Coyote) |
| Carnivora | Canidae | Canis lupus | (Gray Wolf) |
| Carnivora | Canidae | Urocyon littoralis | (Island Gray Fox) |
| Carnivora | Canidae | Vulpes macrotis | (Kit Fox) |
| Carnivora | Canidae | Vulpes vulpes | (Red Fox) |
| Carnivora | Canidae | Canis rufus | (Red Wolf) |
| Carnivora | Canidae | Vulpes velox | (Swift Fox) |
| Carnivora | Felidae | Lynx rufus | (Bobcat) |
| Carnivora | Felidae | Lynx canadensis | (Canada Lynx) |
| Carnivora | Felidae | Puma concolor | (Cougar) |
| Carnivora | Felidae | Panthera onca | (Jaguar) |
| Carnivora | Felidae | Puma yaguarondi | (Jaguarundi) |
| Carnivora | Felidae | Leopardus weidii | (Margay) |
| Carnivora | Felidae | Leopardus pardalis | (Ocelot) |
| Carnivora | Mephitidae | Spilogale putorius | (Eastern Spotted Skunk) |
| Carnivora | Mephitidae | Mephitis macroura | (Hooded Skunk) |
| Carnivora | Mephitidae | Conepatus leuconotus | (North American Hog-nosed Skunk) |
| Carnivora | Mephitidae | Mephitis mephitis | (Striped Skunk) |
| Carnivora | Mephitidae | Spilogale gracilis | (Western Spotted Skunk) |
| Carnivora | Mustelidae | Taxidea taxus | (American Badger) |
| Carnivora | Mustelidae | Martes americana | (American Marten) |
| Carnivora | Mustelidae | Mustela vison | (American Mink) |
| Carnivora | Mustelidae | Mustela nigripes | (Black-footed Ferret) |
| Carnivora | Mustelidae | Mustela erminea | (Ermine) |
| Carnivora | Mustelidae | Martes pennanti | (Fisher) |
| Carnivora | Mustelidae | Mustela nivalis | (Least Weasel) |
| Carnivora | Mustelidae | Mustela frenata | (Long-tailed Weasel) |
| Carnivora | Mustelidae | Lontra canadensis | (Northern River Otter) |
| Carnivora | Mustelidae | Enhydra lutris | (Sea Otter) |
| Carnivora | Mustelidae | Eira barbara | (Tayra) |
| Carnivora | Mustelidae | Gulo gulo | (Wolverine) |
| Carnivora | Odobenidae | Odobenus rosmarus | (Walrus) |
| Carnivora | Otariidae | Zalophus californianus | (California Sea Lion) |
| Carnivora | Otariidae | Arctocephalus townsendi | (Guadalupe Fur Seal) |
| Carnivora | Otariidae | Callorhinus ursinus | (Northern Fur Seal) |
| Carnivora | Otariidae | Eumetopias jubatus | (Steller Sea Lion) |
| Carnivora | Phocidae | Erignathus barbatus | (Bearded Seal) |
| Carnivora | Phocidae | Halichoerus grypus | (Gray Seal) |
| Carnivora | Phocidae | Phoca vitulina | (Harbor Seal) |
| Carnivora | Phocidae | Phoca groenlandica | (Harp Seal) |
| Carnivora | Phocidae | Monachus schauinslandi | (Hawaiian Monk Seal) |
| Carnivora | Phocidae | Cystophora cristata | (Hooded Seal) |
| Carnivora | Phocidae | Mirounga angustirostris | (Northern Elephant Seal) |
| Carnivora | Phocidae | Phoca fasciata | (Ribbon Seal) |
| Carnivora | Phocidae | Phoca hispida | (Ringed Seal) |
| Carnivora | Phocidae | Phoca largha | (Spotted Seal) |
| Carnivora | Procyonidae | Bassariscus sumichrasti | (Cacomistle) |
| Carnivora | Procyonidae | Procyon lotor | (Northern Raccoon) |
| Carnivora | Procyonidae | Bassariscus astutus | (Ringtail) |
| Carnivora | Procyonidae | Nasua narica | (White-nosed Coati) |
| Carnivora | Ursidae | Ursus americanus | (American Black Bear) |
| Carnivora | Ursidae | Ursus arctos | (Brown Bear) |
| Carnivora | Ursidae | Ursus maritimus | (Polar Bear) |
| Cetacea | Balaenidae | Balaena mysticetus | (Bowhead Whale) |
| Cetacea | Balaenidae | Eubalaena glacialis | (North Atlantic Right Whale) |
| Cetacea | Balaenidae | Eubalaena japonica | (North Pacific Right Whale) |
| Cetacea | Balaenopteridae | Balaenoptera musculus | (Blue Whale) |
| Cetacea | Balaenopteridae | Balaenoptera edeni | (Bryde's Whale) |
| Cetacea | Balaenopteridae | Balaenoptera physalus | (Fin Whale) |
| Cetacea | Balaenopteridae | Megaptera novaeangliae | (Humpback Whale) |
| Cetacea | Balaenopteridae | Balaenoptera acutorostrata | (Northern Minke Whale) |
| Cetacea | Balaenopteridae | Balaenoptera borealis | (Sei Whale) |
| Cetacea | Delphinidae | Stenella frontalis | (Atlantic Spotted Dolphin) |
| Cetacea | Delphinidae | Lagenorhynchus acutus | (Atlantic White-sided Dolphin) |
| Cetacea | Delphinidae | Tursiops truncatus | (Bottlenose Dolphin) |
| Cetacea | Delphinidae | Stenella clymene | (Clymene Dolphin) |
| Cetacea | Delphinidae | Pseudorca crassidens | (False Killer Whale) |
| Cetacea | Delphinidae | Lagenodelphis hosei | (Fraser's Dolphin) |
| Cetacea | Delphinidae | Orcinus orca | (Killer Whale) |
| Cetacea | Delphinidae | Delphinus capensis | (Long-beaked Common Dolphin) |
| Cetacea | Delphinidae | Globicephala melas | (Long-finned Pilot Whale) |
| Cetacea | Delphinidae | Peponocephala electra | (Melon-headed Whale) |
| Cetacea | Delphinidae | Lissodelphis borealis | (Northern Right Whale Dolphin) |
| Cetacea | Delphinidae | Lagenorhynchus obliquidens | (Pacific White-sided Dolphin) |
| Cetacea | Delphinidae | Stenella attenuata | (Pantropical Spotted Dolphin) |
| Cetacea | Delphinidae | Grampus griseus | (Risso's Dolphin) |
| Cetacea | Delphinidae | Steno bredanensis | (Rough-toothed Dolphin) |
| Cetacea | Delphinidae | Delphinus delphis | (Short-beaked Common Dolphin) |
| Cetacea | Delphinidae | Globicephala macrorhynchus | (Short-finned Pilot Whale) |
| Cetacea | Delphinidae | Stenella longirostris | (Spinner Dolphin) |
| Cetacea | Delphinidae | Stenella coeruleoalba | (Striped Dolphin) |
| Cetacea | Delphinidae | Lagenorhynchus albirostris | (White-beaked Dolphin) |
| Cetacea | Eschtrichtiidae | Eschrichtius robustus | (Gray Whale) |
| Cetacea | Monodontidae | Delphinapterus leucas | (Beluga) |
| Cetacea | Monodontidae | Monodon monocerus | (Narwhal) |
| Cetacea | Phocoenidae | Phocoenoides dalli | (Dall's Porpoise) |
| Cetacea | Phocoenidae | Phocoena phocoena | (Harbor Porpoise) |
| Cetacea | Physeteridae | Kogia breviceps | (Pygmy Sperm Whale) |
| Cetacea | Physeteridae | Physeter catodon | (Sperm Whale) |
| Cetacea | Ziphiidae | Hyperoodon ampullatus | (Northern Bottlenosed Whale) |
| Chiroptera | Molossidae | Tadarida brasiliensis | (Brazilian Free-tailed Bat) |
| Chiroptera | Phyllostomidae | Macrotus californicus | (California Leaf-nosed Bat) |
| Chiroptera | Phyllostomidae | Choeronycteris mexicana | (Mexican Long-tongued Bat) |
| Chiroptera | Vespertilionidae | Eptesicus fuscus | (Big Brown Bat) |
| Chiroptera | Vespertilionidae | Myotis californicus | (California Myotis) |
| Chiroptera | Vespertilionidae | Nycticeius humeralis | (Evening Bat) |
| Chiroptera | Vespertilionidae | Myotis grisescens | (Gray Myotis) |
| Chiroptera | Vespertilionidae | Lasiurus cinereus | (Hoary Bat) |
| Chiroptera | Vespertilionidae | Myotis sodalis | (Indiana Bat) |
| Chiroptera | Vespertilionidae | Myotis lucifugus | (Little Brown Bat) |
| Chiroptera | Vespertilionidae | Myotis septentrionalis | (Northern Long-eared Myotis) |
| Chiroptera | Vespertilionidae | Antrozous pallidus | (Pallid Bat) |
| Chiroptera | Vespertilionidae | Lasiurus borealis | (Red Bat) |
| Chiroptera | Vespertilionidae | Lasionycteris noctivagans | (Silver-haired Bat) |
| Chiroptera | Vespertilionidae | Myotis auriculus | (Southwestern Myotis) |
| Chiroptera | Vespertilionidae | Corynorhinus townsendii | (Townsend's Big-eared Bat) |
| Chiroptera | Vespertilionidae | Pipistrellus subflavus | (Tri-colored Bat) |
| Chiroptera | Vespertilionidae | Lasiurus blossevillii | (Western Red Bat) |
| Didelphimorphia | Didelphidae | Didelphis virginiana | (Virginia Opossum) |
| Insectivora | Soricidae | Blarina brevicauda | (Northern Short-tailed Shrew) |
| Insectivora | Soricidae | Sorex hoyi | (Pygmy Shrew) |
| Insectivora | Soricidae | Blarina carolinensis | (Southern Short-tailed Shrew) |
| Insectivora | Talpidae | Condylura cristata | (Star-nosed Mole) |
| Lagomorpha | Leporidae | Lepus othus | (Alaskan Hare) |
| Lagomorpha | Leporidae | Sylvilagus obscurus | (Appalachian Cottontail) |
| Lagomorpha | Leporidae | Lepus arcticus | (Arctic Hare) |
| Lagomorpha | Leporidae | Lepus californicus | (Black-tailed Jackrabbit) |
| Lagomorpha | Leporidae | Sylvilagus bachmani | (Brush Rabbit) |
| Lagomorpha | Leporidae | Sylvilagus audubonii | (Desert Cottontail) |
| Lagomorpha | Leporidae | Sylvilagus floridanus | (Eastern Cottontail) |
| Lagomorpha | Leporidae | Sylvilagus palustris | (Marsh Rabbit) |
| Lagomorpha | Leporidae | Sylvilagus nuttallii | (Mountain Cottontail) |
| Lagomorpha | Leporidae | Sylvilagus transitionalis | (New England Cottontail) |
| Lagomorpha | Leporidae | Brachylagus idahoensis | (Pygmy Rabbit) |
| Lagomorpha | Leporidae | Lepus americanus | (Snowshoe Hare) |
| Lagomorpha | Leporidae | Sylvilagus aquaticus | (Swamp Rabbit) |
| Lagomorpha | Leporidae | Lepus townsendii | (White-tailed Jackrabbit) |
| Lagomorpha | Ochotonidae | Ochotona princeps | (American Pika) |
| Rodentia | Aplodontidae | Aplodontia rufa | (Mountain Beaver) |
| Rodentia | Castoridae | Castor canadensis | (American Beaver) |
| Rodentia | Dipodidae | Zapus hudsonius | (Meadow Jumping Mouse) |
| Rodentia | Dipodidae | Zapus princeps | (Western Jumping Mouse) |
| Rodentia | Dipodidae | Napaeozapus insignis | (Woodland Jumping Mouse) |
| Rodentia | Erethizodontidae | Erethizon dorsatum | (North American Porcupine) |
| Rodentia | Geomyidae | Thomomys bottae | (Botta's Pocket Gopher) |
| Rodentia | Geomyidae | Thomomys talpoides | (Northern Pocket Gopher) |
| Rodentia | Geomyidae | Geomys personatus | (Texas Pocket Gopher) |
| Rodentia | Heteromyidae | Chaetodipus baileyi | (Bailey's Pocket Mouse) |
| Rodentia | Heteromyidae | Dipodomys ingens | (Giant Kangaroo Rat) |
| Rodentia | Muridae | Lemmus trimucronatus | (Brown Lemming) |
| Rodentia | Muridae | Neotoma cinerea | (Bushy-tailed Woodrat) |
| Rodentia | Muridae | Peromyscus eremicus | (Cactus Mouse) |
| Rodentia | Muridae | Peromyscus gossypinus | (Cotton Mouse) |
| Rodentia | Muridae | Peromyscus maniculatus | (Deermouse) |
| Rodentia | Muridae | Reithrodontomys humulis | (Eastern Harvest Mouse) |
| Rodentia | Muridae | Sigmodon hispidus | (Hispid Cotton Rat) |
| Rodentia | Muridae | Microtus longicaudus | (Long-tailed Vole) |
| Rodentia | Muridae | Oryzomys palustris | (Marsh Rice Rat) |
| Rodentia | Muridae | Microtus pennsylvanicus | (Meadow Vole) |
| Rodentia | Muridae | Ondatra zibethicus | (Muskrat) |
| Rodentia | Muridae | Peromyscus polionotus | (Oldfield Mouse) |
| Rodentia | Muridae | Microtus chrotorrhinus | (Rock Vole) |
| Rodentia | Muridae | Microtus miurus | (Singing Vole) |
| Rodentia | Muridae | Synaptomys cooperi | (Southern Bog Lemming) |
| Rodentia | Muridae | Microtus oeconomus | (Tundra Vole) |
| Rodentia | Muridae | Reithrodontomys megalotis | (Western Harvest Mouse) |
| Rodentia | Muridae | Peromyscus leucopus | (White-footed Mouse) |
| Rodentia | Muridae | Microtus pinetorum | (Woodland Vole) |
| Rodentia | Sciuridae | Sciurus aberti | (Abert's Squirrel) |
| Rodentia | Sciuridae | Tamias alpinus | (Alpine Chipmunk) |
| Rodentia | Sciuridae | Spermophilus parryii | (Arctic Ground Squirrel) |
| Rodentia | Sciuridae | Spermophilus beldingi | (Belding's Ground Squirrel) |
| Rodentia | Sciuridae | Cynomys ludovicianus | (Black-tailed Prairie Dog) |
| Rodentia | Sciuridae | Spermophilus beecheyi | (California Ground Squirrel) |
| Rodentia | Sciuridae | Tamias dorsalis | (Cliff Chipmunk) |
| Rodentia | Sciuridae | Tamias quadrivittatus | (Colorado Chipmunk) |
| Rodentia | Sciuridae | Spermophilus columbianus | (Columbian Ground Squirrel) |
| Rodentia | Sciuridae | Tamiasciurus douglasii | (Douglas' Squirrel) |
| Rodentia | Sciuridae | Tamias striatus | (Eastern Chipmunk) |
| Rodentia | Sciuridae | Sciurus niger | (Eastern Fox Squirrel) |
| Rodentia | Sciuridae | Sciurus carolinensis | (Eastern Gray Squirrel) |
| Rodentia | Sciuridae | Spermophilus franklinii | (Franklin's Ground Squirrel) |
| Rodentia | Sciuridae | Spermophilus lateralis | (Golden-mantled Ground Squirrel) |
| Rodentia | Sciuridae | Ammospermophilus harrisii | (Harris's Antelope Squirrel) |
| Rodentia | Sciuridae | Marmota caligata | (Hoary Marmot) |
| Rodentia | Sciuridae | Tamias rufus | (Hopi Chipmunk) |
| Rodentia | Sciuridae | Spermophilus brunneus | (Idaho Ground Squirrel) |
| Rodentia | Sciuridae | Tamias minimus | (Least Chipmunk) |
| Rodentia | Sciuridae | Glaucomys sabrinus | (Northern Flying Squirrel) |
| Rodentia | Sciuridae | Marmota olympus | (Olympic Marmot) |
| Rodentia | Sciuridae | Tamiasciurus hudsonicus | (Red Squirrel) |
| Rodentia | Sciuridae | Spermophilus richardsonii | (Richardson's Ground Squirrel) |
| Rodentia | Sciuridae | Spermophilus variegatus | (Rock Squirrel) |
| Rodentia | Sciuridae | Spermophilus tereticaudus | (Round-tailed Ground Squirrel) |
| Rodentia | Sciuridae | Glaucomys volans | (Southern Flying Squirrel) |
| Rodentia | Sciuridae | Spermophilus spilosoma | (Spotted Ground Squirrel) |
| Rodentia | Sciuridae | Spermophilus tridecemlineatus | (Thirteen-lined Ground Squirrel) |
| Rodentia | Sciuridae | Spermophilus armatus | (Uinta Ground Squirrel) |
| Rodentia | Sciuridae | Cynomys parvidens | (Utah Prairie Dog) |
| Rodentia | Sciuridae | Sciurus griseus | (Western Gray Squirrel) |
| Rodentia | Sciuridae | Cynomys leucurus | (White-tailed Prairie Dog) |
| Rodentia | Sciuridae | Marmota monax | (Woodchuck) |
| Rodentia | Sciuridae | Spermophilus elegans | (Wyoming Ground Squirrel) |
| Rodentia | Sciuridae | Marmota flaviventris | (Yellow-bellied Marmot) |
| Rodentia | Sciuridae | Tamias amoenus | (Yellow-pine Chipmunk) |
| Sirenia | Trichechidae | Trichechus manatus | (West Indian Manatee) |
| Xenarthra | Dasypodidae | Dasypus novemcinctus | (Nine-banded Armadillo) |