KnowKi

Learn the wildlife of the U.S. national parks

Learn the wildlife of Yellowstone National Park

WY · MT · ID

1,977 species have research-grade observations inside Yellowstone National Park on iNaturalist. KnowKi turns the most recorded into short lessons with real photos, so you know what you're looking at before you go.

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Āki the kiwi, KnowKi's guide

Most recorded here

The species with the most research-grade observations on iNaturalist, and how many each has. Most recorded doesn't mean native.

Birds

  1. Common Raven Corvus corax2,253
  2. Mountain Bluebird Sialia currucoides951
  3. Killdeer Charadrius vociferus879
  4. Osprey Pandion haliaetus695
  5. Trumpeter Swan Cygnus buccinator680
  6. Bald Eagle Haliaeetus leucocephalus627
  7. Canada Goose Branta canadensis624
  8. Sandhill Crane Antigone canadensis597
  9. Black-billed Magpie Pica hudsonia573
  10. Brewer's Blackbird Euphagus cyanocephalus556

Plants

  1. Lodgepole pine Pinus contorta1,927
  2. Rocky Mountain Fringed Gentian Gentianopsis thermalis810
  3. Sticky geranium Geranium viscosissimum793
  4. Fireweed Chamaenerion angustifolium659
  5. Sulfur buckwheat Eriogonum umbellatum651
  6. Lanceleaf Stonecrop Sedum lanceolatum646
  7. Common yarrow Achillea millefolium506
  8. Woodland pinedrops Pterospora andromedea483
  9. Arrowleaf balsamroot Balsamorhiza sagittata453
  10. Western harebell Campanula petiolata434

Mammals

  1. American Bison Bos bison9,611
  2. Wapiti Cervus canadensis5,061
  3. American Black Bear Ursus americanus2,300
  4. Pronghorn Antilocapra americana1,974
  5. Brown Bear Ursus arctos1,681
  6. Coyote Canis latrans1,533
  7. Uinta Ground Squirrel Urocitellus armatus1,299
  8. Gray Wolf Canis lupus1,113
  9. Yellow-bellied Marmot Marmota flaviventris1,000
  10. Mule Deer Odocoileus hemionus976

Insects

  1. Flame Skimmer Libellula saturata333
  2. Mormon Fritillary Argynnis mormonia329
  3. Rocky Mountain Parnassian Parnassius smintheus250
  4. White-spotted Sawyer Monochamus scutellatus226
  5. Boisduval's Blue Icaricia icarioides199
  6. Essex Skipper Thymelicus lineola193
  7. Western Pondhawk Erythemis collocata183
  8. Mormon Cricket Anabrus simplex178
  9. Painted Lady Vanessa cardui171
  10. Blue Copper Tharsalea heteronea166

Reptiles

  1. Western Terrestrial Garter Snake Thamnophis elegans424
  2. Gopher Snake Pituophis catenifer215
  3. Common Sagebrush Lizard Sceloporus graciosus56

Amphibians

  1. Columbia Spotted Frog Rana luteiventris274
  2. Boreal Chorus Frog Pseudacris maculata112
  3. Western Toad Anaxyrus boreas112
  4. Western Tiger Salamander Ambystoma mavortium105

Fish

  1. Rocky Mountain Cutthroat Trout Oncorhynchus virginalis188
  2. Brown Trout Salmo trutta34
  3. Brook Trout Salvelinus fontinalis23
  4. Rainbow Trout Oncorhynchus mykiss20

How a trip works

A trip has its own trail of lessons: meet six species, match them to new photos, then practice with four choices. Species you learn go into your Fieldbook, and starting a trip earns its Passport stamp. Your home place stays as it is.

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Species lists and counts from research-grade observations on iNaturalist, as of October 2026. KnowKi is not affiliated with the National Park Service. Free, with no ads, no account and no purchases.