Old Faithful draws the crowds, but for many visitors the animals are what bring them back to Yellowstone National Park. The park is home to 67 mammal species, including seven native hoofed animals: elk, mule deer, white-tailed deer, bison, moose, bighorn sheep and pronghorn. Both grizzly bears and black bears live here. Yellowstone’s bison are the largest bison population on public land in the country, with a 2025 estimate of nearly 5,300, and the Hayden and Lamar valleys are good places to see them all year.
Gray wolves returned in 1995. Over three years, 41 wild wolves from Canada and northwest Montana were released in the park, and since 2009 wolf numbers have ranged from 83 to 123. Smaller animals reward patience too. The red fox is the smallest of the park’s three wild canids, and in spring you may see Yellowstone cutthroat trout, the park’s most widespread native trout, leaping upstream at LeHardys Rapids on the Yellowstone River. Keep reading to see featured photos of Yellowstone’s wildlife and to learn more about wildlife photography.
Featured Yellowstone National Park Wildlife Photographs
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Wildlife Photography Tips
Wildlife photography in the US National Parks offers a unique and enriching experience, as these protected areas are havens for diverse species and pristine natural landscapes. Capturing wildlife in such settings requires preparation and respect for both the environment and its inhabitants. Photographers should familiarize themselves with the specific animals and ecosystems of the park they are visiting, as each park hosts different species and behaviors. Early mornings and late afternoons, known as the golden hours, provide the best light and increased wildlife activity. Different seasons also offer different wildlife viewing opportunities. Patience and stillness are key, as the best moments often come to those who wait quietly.
If wildlife does present itself, always make sure to maintain a safe distance. Using a telephoto lens allows for close-up shots without intruding on the animals’ space. If you already own or want to own a professional grade mirrored camera like the Canon EOS 5D Mark IV Full Frame Digital SLR, we recommend using a Canon EF 100-400mm f/4.5-5.6L IS II USM Lens zoom lens for wildlife photography. If you have or are interested in a newer mirrorless model like the Canon EOS R5 Full-Frame Mirrorless Camera, we recommend using a Canon RF100-400mm F5.6-8 IS USM Black for long distance shots.
Not quite ready to invest in traditional professional-grade camera equipment but want to enhance the quality of your cell phone photographs? Consider using a Moment Tele 58mm Mobile Lens II for improved reach, and use a Moment camera case with a lens mount to attach it to your phone. Since cell phones generally cannot provide the same reach as a dedicated telephoto camera lens, never compensate by moving dangerously close to wildlife. As with any visit to a national park, it’s important to follow park regulations, practice “Leave No Trace” principles, and prioritize safety while photographing wildlife.
Want to take your wildlife photos further? Featured photographer Vella Torvik shares her field-tested advice on gear, camera settings, light, composition and safely approaching wildlife in our Wildlife Photography 101: Insider Tips From the Field masterclass.
Yellowstone Wildlife Education and Resources
Want to learn more about Yellowstone National Park and the wildlife that inhabits it? Check out these guides & books:
- Peterson Field Guide To Mammals Of North America: Fourth Edition (Peterson Field Guides)
- Peterson Field Guide To Birds Of Western North America, Fifth Edition (Peterson Field Guides)
- Bird Songs: 250 North American Birds in Song
- Peterson Field Guide To Western Reptiles & Amphibians, Fourth Edition (Peterson Field Guides)
- Peterson Field Guide to Freshwater Fishes, Second Edition (Peterson Field Guides)
- Animal Tracks: A Folding Pocket Guide to the Tracks & Signs of Familiar North American Species (Wildlife and Nature Identification)
Please note, by making purchases through our affiliate links, you are supporting our mission to celebrate and showcase our National Parks and the photographers who frequent them. As an Amazon Associate, National Park Photographer earns from qualifying purchases at no cost to you. We appreciate your support.
Yellowstone National Park Species List
The wildlife at Yellowstone National Park is beautiful and diverse. There are a variety of mammals, birds, reptiles, amphibians and fish to view. Check out all the incredible species this park has to offer! Click on the links below to see the different animal species that inhabit Yellowstone National Park:
Yellowstone National Park Mammals
| Name | Abundance |
|---|---|
| American Badger (Taxidea taxus) | Common |
| American Beaver (Castor canadensis) | Uncommon |
| American Bison (Bison bison) | Abundant |
| American Black Bear (Ursus americanus) | Common |
| American Mink (Mustela vison) | Common |
| American Pika (Ochotona princeps) | Common |
| Big Brown Bat (Eptesicus fuscus) | Uncommon |
| Bighorn Sheep (Ovis canadensis) | Uncommon |
| Bobcat (Lynx rufus) | Uncommon |
| Bushy-tailed Woodrat (Neotoma cinerea) | Common |
| California Myotis (Myotis californicus) | Unknown |
| Canada Lynx (Lynx canadensis) | Rare |
| Coyote (Canis latrans) | Abundant |
| Deer Mouse (Peromyscus maniculatus) | Abundant |
| Desert Cottontail (Sylvilagus audubonii) | Common |
| Dusky Shrew (Sorex monticolus) | Uncommon |
| Dwarf Shrew (Sorex nanus) | Rare |
| Elk (Cervus elaphus) | Abundant |
| Ermine (Mustela erminea) | Common |
| Fringed Myotis (Myotis thysanodes) | Rare |
| Golden-mantled Ground Squirrel (Spermophilus lateralis) | Common |
| Gray Wolf (Canis lupus) | Common |
| Grizzly Bear (Ursus arctos horribilis) | Common |
| Heather Vole (Phenacomys intermedius) | Rare |
| Hoary Bat (Lasiurus cinereus) | Uncommon |
| House Mouse (Mus musculus) | Unknown |
| Least Chipmunk (Neotamias minimus) | Abundant |
| Little Brown Bat (Myotis lucifugus) | Abundant |
| Long-legged Myotis (Myotis volans) | Uncommon |
| Long-tailed Vole (Microtus longicaudus) | Common |
| Long-tailed Weasel (Mustela frenata) | Common |
| Masked Shrew (Sorex cinereus) | Common |
| Meadow Vole (Microtus pennsylvanicus) | Abundant |
| Montane Vole (Microtus montanus) | Abundant |
| Moose (Alces alces) | Uncommon |
| Mountain Cottontail (Sylvilagus nuttallii) | Common |
| Mountain Goat (Oreamnos americanus) | Uncommon |
| Mountain Lion (Puma concolor) | Uncommon |
| Mule Deer (Odocoileus hemionus) | Abundant |
| Muskrat (Ondatra zibethicus) | Common |
| North American Wolverine (Gulo gulo) | Rare |
| Northern Flying Squirrel (Glaucomys sabrinus) | Uncommon |
| Northern Pocket Gopher (Thomomys talpoides) | Common |
| Pine Marten (Martes americana) | Uncommon |
| Porcupine (Erethizon dorsatum) | Common |
| Preble’s Shrew (Sorex preblei) | Rare |
| Pronghorn (Antilocapra americana) | Common |
| Raccoon (Procyon lotor) | Uncommon |
| Red Fox (Vulpes vulpes) | Common |
| Red Squirrel (Tamiasciurus hudsonicus) | Abundant |
| Richardson Water Vole (Microtus richardsoni) | Uncommon |
| River Otter (Lutra canadensis) | Uncommon |
| Silver-haired Bat (Lasionycteris noctivagans) | Common |
| Snowshoe Hare (Lepus americanus) | Common |
| Southern Red-backed Vole (Clethrionomys gapperi) | Abundant |
| Striped Skunk (Mephitis mephitis) | Rare |
| Townsend’s Big-eared Bat (Corynorhinus townsendii) | Rare |
| Uinta Chipmunk (Neotamias umbrinus) | Common |
| Uinta Ground Squirrel (Spermophilus armatus) | Abundant |
| Water Shrew (Sorex palustris) | Uncommon |
| Western Jumping Mouse (Zapus princeps) | Uncommon |
| White-tailed Deer (Odocoileus virginianus) | Uncommon |
| White-tailed Jackrabbit (Lepus townsendii) | Unknown |
| Yellow Pine Chipmunk (Neotamias amoenus) | Common |
| Yellow-bellied Marmot (Marmota flaviventris) | Common |
| Yellowstone Moose (Alces alces shirasi) | Uncommon |
Yellowstone National Park Birds
| Name | Abundance |
|---|---|
| American Avocet (Recurvirostra americana) | Rare |
| American Bittern (Botaurus lentiginosus) | Unknown |
| American Cliff Swallow (Petrochelidon pyrrhonota) | Common |
| American Coot (Fulica americana) | Abundant |
| American Crow (Corvus brachyrhynchos) | Uncommon |
| American Dipper (Cinclus mexicanus) | Common |
| American Dusky Flycatcher (Empidonax oberholseri) | Common |
| American Goldfinch (Spinus tristis) | Rare |
| American Kestrel (Falco sparverius) | Common |
| American Peregrine Falcon (Falco peregrinus anatum) | Uncommon |
| American Pipit (Anthus rubescens) | Rare |
| American Redstart (Setophaga ruticilla) | Rare |
| American Robin (Turdus migratorius) | Abundant |
| American Tree Sparrow (Spizella arborea) | Uncommon |
| American White Pelican (Pelecanus erythrorhynchos) | Common |
| American Wigeon (Anas americana) | Common |
| Arctic Tern (Sterna paradisaea) | Unknown |
| Ash-throated Flycatcher (Myiarchus cinerascens) | Unknown |
| Baird’s Sandpiper (Calidris bairdii) | Uncommon |
| Bald Eagle (Haliaeetus leucocephalus) | Common |
| Band-tailed Pigeon (Patagioenas fasciata) | Unknown |
| Barn Swallow (Hirundo rustica) | Uncommon |
| Barrow’s Goldeneye (Bucephala islandica) | Abundant |
| Belted Kingfisher (Ceryle alcyon) | Uncommon |
| Black Rosy-finch (Leucosticte atrata) | Uncommon |
| Black Tern (Chlidonias niger) | Unknown |
| Black-and-white Warbler (Mniotilta varia) | Rare |
| Black-backed Woodpecker (Picoides arcticus) | Rare |
| Black-bellied Plover (Pluvialis squatarola) | Uncommon |
| Black-billed Cuckoo (Coccyzus erythropthalmus) | Unknown |
| Black-billed Magpie (Pica hudsonia) | Common |
| Black-capped Chickadee (Poecile atricapillus) | Uncommon |
| Black-crowned Night-heron (Nycticorax nycticorax) | Rare |
| Black-headed Grosbeak (Pheucticus melanocephalus) | Rare |
| Black-legged Kittiwake (Rissa tridactyla) | Unknown |
| Black-necked Stilt (Himantopus mexicanus) | Rare |
| Black-throated Sparrow (Amphispiza bilineata) | Unknown |
| Blackburnian Warbler (Setophaga fusca) | Rare |
| Blackpoll Warbler (Setophaga striata) | Rare |
| Blue Jay (Cyanocitta cristata) | Occasional |
| Blue-gray Gnatcatcher (Polioptila caerulea) | Unknown |
| Blue-winged Teal (Anas discors) | Uncommon |
| Bobolink (Dolichonyx oryzivorus) | Unknown |
| Bohemian Waxwing (Bombycilla garrulus) | Common |
| Bonaparte’s Gull (Larus philadelphia) | Rare |
| Boreal Owl (Aegolius funereus) | Uncommon |
| Brewer’s Blackbird (Euphagus cyanocephalus) | Common |
| Brewer’s Sparrow (Spizella breweri) | Common |
| Broad-tailed Hummingbird (Selasphorus platycercus) | Rare |
| Broad-winged Hawk (Buteo platypterus) | Rare |
| Brown Creeper (Certhia americana) | Uncommon |
| Brown-headed Cowbird (Molothrus ater) | Common |
| Bufflehead (Bucephala albeola) | Common |
| Bullock’s Oriole (Icterus bullockii) | Rare |
| Burrowing Owl (Athene cunicularia) | Unknown |
| Cackling Goose (Branta hutchinsii) | Unknown |
| California Gull (Larus californicus) | Common |
| Calliope Hummingbird (Stellula calliope) | Rare |
| Canada Goose (Branta canadensis) | Abundant |
| Canada Jay (Perisoreus canadensis) | Common |
| Canvasback (Aythya valisineria) | Uncommon |
| Canyon Wren (Catherpes mexicanus) | Unknown |
| Cape May Warbler (Setophaga tigrina) | Unknown |
| Caspian Tern (Hydroprogne caspia) | Rare |
| Cassin’s Finch (Carpodacus cassinii) | Common |
| Cattle Egret (Bubulcus ibis) | Unknown |
| Cedar Waxwing (Bombycilla cedrorum) | Uncommon |
| Chestnut-sided Warbler (Setophaga pensylvanica) | Unknown |
| Chipping Sparrow (Spizella passerina) | Abundant |
| Chukar (Alectoris chukar) | Occasional |
| Cinnamon Teal (Anas cyanoptera) | Common |
| Clark’s Grebe (Aechmophorus clarkii) | Rare |
| Clark’s Nutcracker (Nucifraga columbiana) | Abundant |
| Clay-colored Sparrow (Spizella pallida) | Unknown |
| Common Goldeneye (Bucephala clangula) | Common |
| Common Grackle (Quiscalus quiscula) | Unknown |
| Common Loon (Gavia immer) | Uncommon |
| Common Merganser (Mergus merganser) | Common |
| Common Nighthawk (Chordeiles minor) | Common |
| Common Raven (Corvus corax) | Abundant |
| Common Redpoll (Acanthis flammea) | Uncommon |
| Common Tern (Sterna hirundo) | Rare |
| Common Yellowthroat (Geothlypis trichas) | Common |
| Cooper’s Hawk (Accipiter cooperii) | Uncommon |
| Cordilleran Flycatcher (Empidonax occidentalis) | Rare |
| Crested Caracara (Caracara cheriway) | Unknown |
| Dark-eyed Junco (Junco hyemalis) | Abundant |
| Double-crested Cormorant (Phalacrocorax auritus) | Uncommon |
| Downy Woodpecker (Picoides pubescens) | Uncommon |
| Dusky Grouse (Dendragapus obscurus) | Common |
| Eared Grebe (Podiceps nigricollis) | Uncommon |
| Eastern Kingbird (Tyrannus tyrannus) | Rare |
| Eurasian Collared-dove (Streptopelia decaocto) | Occasional |
| Eurasian Wigeon (Anas penelope) | Unknown |
| European Starling (Sturnus vulgaris) | Uncommon |
| Evening Grosbeak (Coccothraustes vespertinus) | Occasional |
| Ferruginous Hawk (Buteo regalis) | Uncommon |
| Flammulated Owl (Psiloscops flammeolus) | Unknown |
| Forster’s Tern (Sterna forsteri) | Rare |
| Fox Sparrow (Passerella iliaca) | Rare |
| Franklin’s Gull (Larus pipixcan) | Rare |
| Gadwall (Anas strepera) | Common |
| Golden Eagle (Aquila chrysaetos) | Uncommon |
| Golden-crowned Kinglet (Regulus satrapa) | Uncommon |
| Grasshopper Sparrow (Ammodramus savannarum) | Occasional |
| Gray Catbird (Dumetella carolinensis) | Rare |
| Gray Partridge (Perdix perdix) | Unknown |
| Gray-crowned Rosy-finch (Leucosticte tephrocotis) | Occasional |
| Great Blue Heron (Ardea herodias) | Common |
| Great Egret (Ardea alba) | Unknown |
| Great Gray Owl (Strix nebulosa) | Uncommon |
| Great Horned Owl (Bubo virginianus) | Common |
| Greater Scaup (Aythya marila) | Rare |
| Greater White-fronted Goose (Anser albifrons) | Unknown |
| Greater Yellowlegs (Tringa melanoleuca) | Uncommon |
| Green Heron (Butorides virescens) | Unknown |
| Green-tailed Towhee (Pipilo chlorurus) | Uncommon |
| Green-winged Teal (Anas crecca) | Common |
| Hairy Woodpecker (Picoides villosus) | Common |
| Hammond’s Flycatcher (Empidonax hammondii) | Uncommon |
| Harlequin Duck (Histrionicus histrionicus) | Uncommon |
| Harris’s Sparrow (Zonotrichia querula) | Unknown |
| Hen Harrier (Circus cyaneus) | Uncommon |
| Hermit Thrush (Catharus guttatus) | Common |
| Herring Gull (Larus argentatus) | Rare |
| Hooded Merganser (Lophodytes cucullatus) | Rare |
| Hooded Warbler (Setophaga citrina) | Unknown |
| Horned Grebe (Podiceps auritus) | Rare |
| Horned Lark (Eremophila alpestris) | Uncommon |
| House Finch (Carpodacus mexicanus) | Unknown |
| House Sparrow (Passer domesticus) | Common |
| House Wren (Troglodytes aedon) | Common |
| Hudsonian Godwit (Limosa haemastica) | Unknown |
| Killdeer (Charadrius vociferus) | Common |
| Lapland Longspur (Calcarius lapponicus) | Unknown |
| Lark Bunting (Calamospiza melanocorys) | Unknown |
| Lark Sparrow (Chondestes grammacus) | Occasional |
| Lazuli Bunting (Passerina amoena) | Common |
| Least Flycatcher (Empidonax minimus) | Unknown |
| Least Sandpiper (Calidris minutilla) | Rare |
| Lesser Goldfinch (Spinus psaltria) | Unknown |
| Lesser Scaup (Aythya affinis) | Common |
| Lesser Yellowlegs (Tringa flavipes) | Rare |
| Lewis’ Woodpecker (Melanerpes lewis) | Rare |
| Lincoln’s Sparrow (Melospiza lincolnii) | Common |
| Loggerhead Shrike (Lanius ludovicianus) | Rare |
| Long-billed Curlew (Numenius americanus) | Rare |
| Long-billed Dowitcher (Limnodromus scolopaceus) | Uncommon |
| Long-eared Owl (Asio otus) | Rare |
| Long-tailed Duck (Clangula hyemalis) | Unknown |
| MacGillivray’s Warbler (Geothlypis tolmiei) | Uncommon |
| Mallard (Anas platyrhynchos) | Abundant |
| Marbled Godwit (Limosa fedoa) | Rare |
| Marsh Wren (Cistothorus palustris) | Rare |
| Merlin (Falco columbarius) | Rare |
| Mew Gull (Larus canus) | Unknown |
| Mountain Bluebird (Sialia currucoides) | Common |
| Mountain Chickadee (Poecile gambeli) | Abundant |
| Mountain Pygmy Owl (Glaucidium gnoma) | Rare |
| Mourning Dove (Zenaida macroura) | Rare |
| Nashville Warbler (Oreothlypis ruficapilla) | Rare |
| Northern Flicker (Colaptes auratus) | Common |
| Northern Goshawk (Accipiter gentilis) | Uncommon |
| Northern Pintail (Anas acuta) | Common |
| Northern Rough-winged Swallow (Stelgidopteryx serripennis) | Uncommon |
| Northern Saw-whet Owl (Aegolius acadicus) | Uncommon |
| Northern Shoveler (Anas clypeata) | Common |
| Northern Shrike (Lanius excubitor) | Uncommon |
| Northern Waterthrush (Seiurus noveboracensis) | Rare |
| Olive-sided Flycatcher (Contopus cooperi) | Common |
| Orange-crowned Warbler (Oreothlypis celata) | Uncommon |
| Osprey (Pandion haliaetus) | Common |
| Ovenbird (Seiurus aurocapillus) | Unknown |
| Pacific Loon (Gavia pacifica) | Unknown |
| Pectoral Sandpiper (Calidris melanotos) | Rare |
| Peregrine Falcon (Falco peregrinus) | Uncommon |
| Pied-billed Grebe (Podilymbus podiceps) | Common |
| Pileated Woodpecker (Dryocopus pileatus) | Rare |
| Pine Grosbeak (Pinicola enucleator) | Uncommon |
| Pine Siskin (Spinus pinus) | Common |
| Pinyon Jay (Gymnorhinus cyanocephalus) | Rare |
| Prairie Falcon (Falco mexicanus) | Uncommon |
| Prairie Warbler (Setophaga discolor) | Unknown |
| Prothonotary Warbler (Protonotaria citrea) | Unknown |
| Pygmy Nuthatch (Sitta pygmaea) | Unknown |
| Red Crossbill (Loxia curvirostra) | Uncommon |
| Red-breasted Merganser (Mergus serrator) | Uncommon |
| Red-breasted Nuthatch (Sitta canadensis) | Common |
| Red-eyed Vireo (Vireo olivaceus) | Unknown |
| Red-headed Woodpecker (Melanerpes erythrocephalus) | Rare |
| Red-naped Sapsucker (Sphyrapicus nuchalis) | Uncommon |
| Red-necked Grebe (Podiceps grisegena) | Rare |
| Red-necked Phalarope (Phalaropus lobatus) | Rare |
| Red-shouldered Hawk (Buteo lineatus) | Unknown |
| Red-tailed Hawk (Buteo jamaicensis) | Abundant |
| Red-winged Blackbird (Agelaius phoeniceus) | Common |
| Redhead (Aythya americana) | Uncommon |
| Ring-billed Gull (Larus delawarensis) | Common |
| Ring-necked Duck (Aythya collaris) | Common |
| Rock Pigeon (Columba livia) | Uncommon |
| Rock Wren (Salpinctes obsoletus) | Uncommon |
| Rose-breasted Grosbeak (Pheucticus ludovicianus) | Unknown |
| Ross’ Goose (Chen rossii) | Rare |
| Rough-legged Hawk (Buteo lagopus) | Common |
| Ruby-crowned Kinglet (Regulus calendula) | Abundant |
| Ruddy Duck (Oxyura jamaicensis) | Common |
| Ruddy Turnstone (Arenaria interpres) | Rare |
| Ruffed Grouse (Bonasa umbellus) | Common |
| Rufous Hummingbird (Selasphorus rufus) | Rare |
| Rusty Blackbird (Euphagus carolinus) | Unknown |
| Sabine’s Gull (Xema sabini) | Unknown |
| Sage Thrasher (Oreoscoptes montanus) | Uncommon |
| Sagebrush Sparrow (Artemisiospiza nevadensis) | Unknown |
| Sand Martin (Riparia riparia) | Uncommon |
| Sanderling (Calidris alba) | Rare |
| Sandhill Crane (Grus canadensis) | Common |
| Savannah Sparrow (Passerculus sandwichensis) | Common |
| Say’s Phoebe (Sayornis saya) | Unknown |
| Scissor-tailed Flycatcher (Tyrannus forficatus) | Unknown |
| Semipalmated Plover (Charadrius semipalmatus) | Uncommon |
| Semipalmated Sandpiper (Calidris pusilla) | Rare |
| Sharp-shinned Hawk (Accipiter striatus) | Uncommon |
| Short-billed Dowitcher (Limnodromus griseus) | Rare |
| Short-eared Owl (Asio flammeus) | Rare |
| Snow Bunting (Plectrophenax nivalis) | Occasional |
| Snow Goose (Chen caerulescens) | Rare |
| Snowy Egret (Egretta thula) | Unknown |
| Snowy Owl (Bubo scandiacus) | Unknown |
| Solitary Sandpiper (Tringa solitaria) | Rare |
| Song Sparrow (Melospiza melodia) | Common |
| Sora (Porzana carolina) | Common |
| Spotted Sandpiper (Actitis macularia) | Common |
| Spotted Towhee (Pipilo maculatus) | Rare |
| Steller’s Jay (Cyanocitta stelleri) | Uncommon |
| Surf Scoter (Melanitta perspicillata) | Unknown |
| Swainson’s Hawk (Buteo swainsoni) | Common |
| Swainson’s Thrush (Catharus ustulatus) | Uncommon |
| Swamp Sparrow (Melospiza georgiana) | Unknown |
| Tennessee Warbler (Oreothlypis peregrina) | Rare |
| Thick-billed Longspur (Calcarius mccownii) | Unknown |
| Three-toed Woodpecker (Picoides dorsalis) | Uncommon |
| Townsend’s Solitaire (Myadestes townsendi) | Common |
| Townsend’s Warbler (Setophaga townsendi) | Uncommon |
| Tree Swallow (Tachycineta bicolor) | Common |
| Tricolored Heron (Egretta tricolor) | Unknown |
| Trumpeter Swan (Cygnus buccinator) | Uncommon |
| Tundra Swan (Cygnus columbianus) | Uncommon |
| Turkey Vulture (Cathartes aura) | Uncommon |
| Upland Sandpiper (Bartramia longicauda) | Rare |
| Varied Thrush (Ixoreus naevius) | Unknown |
| Veery (Catharus fuscescens) | Rare |
| Vesper Sparrow (Pooecetes gramineus) | Common |
| Violet-green Swallow (Tachycineta thalassina) | Common |
| Virginia Rail (Rallus limicola) | Rare |
| Warbling Vireo (Vireo gilvus) | Common |
| Western Bluebird (Sialia mexicana) | Rare |
| Western Grebe (Aechmophorus occidentalis) | Rare |
| Western Kingbird (Tyrannus verticalis) | Rare |
| Western Meadowlark (Sturnella neglecta) | Common |
| Western Sandpiper (Calidris mauri) | Rare |
| Western Screech-owl (Megascops kennicottii) | Rare |
| Western Tanager (Piranga ludoviciana) | Common |
| Western Wood Pewee (Contopus sordidulus) | Uncommon |
| White-breasted Nuthatch (Sitta carolinensis) | Uncommon |
| White-crowned Sparrow (Zonotrichia leucophrys) | Common |
| White-faced Ibis (Plegadis chihi) | Rare |
| White-rumped Sandpiper (Calidris fuscicollis) | Rare |
| White-throated Sparrow (Zonotrichia albicollis) | Uncommon |
| White-throated Swift (Aeronautes saxatalis) | Uncommon |
| White-winged Crossbill (Loxia leucoptera) | Rare |
| White-winged Scoter (Melanitta fusca) | Unknown |
| Whooper Swan (Cygnus cygnus) | Unknown |
| Whooping Crane (Grus americana) | Occasional |
| Wild Turkey (Meleagris gallopavo) | Occasional |
| Willet (Tringa semipalmata) | Uncommon |
| Williamson’s Sapsucker (Sphyrapicus thyroideus) | Uncommon |
| Willow Flycatcher (Empidonax traillii) | Uncommon |
| Wilson’s Phalarope (Phalaropus tricolor) | Uncommon |
| Wilson’s Snipe (Gallinago delicata) | Common |
| Wilson’s Warbler (Cardellina pusilla) | Uncommon |
| Wood Duck (Aix sponsa) | Rare |
| Yellow Rail (Coturnicops noveboracensis) | Unknown |
| Yellow Warbler (Setophaga petechia) | Common |
| Yellow-breasted Chat (Icteria virens) | Unknown |
| Yellow-headed Blackbird (Xanthocephalus xanthocephalus) | Common |
| Yellow-rumped Warbler (Setophaga coronata) | Abundant |
Yellowstone National Park Reptiles
| Name | Abundance |
|---|---|
| Bullsnake (Pituophis catenifer sayi) | Common |
| Northern Rubber Boa (Charina bottae) | Rare |
| Northern Sagebrush Lizard (Sceloporus graciosus graciosus) | Uncommon |
| Prairie Rattlesnake (Crotalus viridis viridis) | Common |
| Valley Garter Snake (Thamnophis sirtalis fitchi) | Rare |
| Wandering Garter Snake (Thamnophis elegans vagrans) | Common |
Yellowstone National Park Amphibians
| Name | Abundance |
|---|---|
| Boreal Chorus Frog (Pseudacris maculata) | Abundant |
| Boreal Toad (Anaxyrus boreas boreas) | Uncommon |
| Columbia Spotted Frog (Rana luteiventris) | Abundant |
| Plains Spadefoot (Spea bombifrons) | Unknown |
| Western Tiger Salamander (Ambystoma mavortium) | Common |
Yellowstone National Park Fish
| Name | Abundance |
|---|---|
| Arctic Grayling (Thymallus arcticus) | Rare |
| Brook Trout (Salvelinus fontinalis) | Abundant |
| Brown Trout (Salmo trutta) | Abundant |
| Finespotted Snake River Cutthroat Trout (Oncorhynchus clarkii behnkei) | Uncommon |
| Lake Chub (Couesius plumbeus) | Uncommon |
| Lake Trout (Salvelinus namaycush) | Abundant |
| Longnose Dace (Rhinichthys cataractae) | Abundant |
| Longnose Sucker (Catostomus catostomus) | Abundant |
| Mottled Sculpin (Cottus bairdii) | Abundant |
| Mountain Sucker (Catostomus platyrhynchus) | Abundant |
| Mountain Whitefish (Prosopium williamsoni) | Abundant |
| Rainbow Trout (Oncorhynchus mykiss) | Abundant |
| Redside Shiner (Richardsonius balteatus) | Abundant |
| Speckled Dace (Rhinichthys osculus) | Common |
| Utah Chub (Gila atraria) | Abundant |
| Utah Sucker (Catostomus ardens) | Common |
| Westslope Cutthroat Trout (Oncorhynchus clarkii lewisi) | Rare |
| Yellowstone Cutthroat Trout (Oncorhynchus clarkii bouvieri) | Abundant |
Note: The wildlife species included in the lists above have been confirmed with the National Park Service to be present in Yellowstone National Park. Other species may exist in the park that are currently under review or not yet known.
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