KnowKi

Learn the wildlife of the U.S. national parks

Learn the wildlife of Arches National Park

UT

626 species have research-grade observations inside Arches 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 corax602
  2. Black-throated Sparrow Amphispiza bilineata111
  3. Woodhouse's Scrub-Jay Aphelocoma woodhouseii78
  4. Rock Wren Salpinctes obsoletus67
  5. Mountain Bluebird Sialia currucoides49
  6. Blue-gray Gnatcatcher Polioptila caerulea41
  7. Juniper Titmouse Baeolophus ridgwayi37
  8. House Finch Haemorhous mexicanus30
  9. White-throated Swift Aeronautes saxatalis29
  10. Violet-green Swallow Tachycineta thalassina28

Plants

  1. Utah Juniper Juniperus osteosperma494
  2. Single-leaf ash Fraxinus anomala376
  3. Plains Pricklypear Opuntia polyacantha326
  4. Tucker Oak Quercus welshii314
  5. Stansbury's Cliffrose Purshia stansburyana276
  6. Colorado Pinyon Pinus edulis242
  7. Blackbrush Coleogyne ramosissima234
  8. Desert Prince's Plume Stanleya pinnata227
  9. Kingcup Cactus Echinocereus triglochidiatus216
  10. Canaigre Dock Rumex hymenosepalus184

Mammals

  1. Hopi Chipmunk Neotamias rufus310
  2. Mule Deer Odocoileus hemionus181
  3. Desert Cottontail Sylvilagus audubonii103
  4. White-tailed Antelope Squirrel Ammospermophilus leucurus81
  5. Rock Squirrel Otospermophilus variegatus65
  6. White-tailed Prairie Dog Cynomys leucurus51
  7. Black-tailed Jackrabbit Lepus californicus19
  8. Pronghorn Antilocapra americana9
  9. Ord's Kangaroo Rat Dipodomys ordii8
  10. Common Raccoon Procyon lotor5

Insects

  1. Cotton-gall Tephritid Aciurina bigeloviae55
  2. Eleodes caudifera55
  3. Dasymutilla vestita23
  4. Western Pygmy-Blue Brephidium exilis19
  5. Rough Harvester Ant Pogonomyrmex rugosus16
  6. White-lined Sphinx Hyles lineata15
  7. Hairy Bear Scarab Beetle Paracotalpa granicollis15
  8. Bubble-gall tephritid Aciurina trixa15
  9. Golden Paper Wasp Polistes aurifer13
  10. Fourwing Saltbush Woolly Gall Midge Asphondylia neomexicana13

Spiders and kin

  1. Western Black Widow Latrodectus hesperus17
  2. Eastern sand scorpion Paruroctonus utahensis8
  3. Northern Scorpion Paruroctonus boreus7
  4. Banded Garden Spider Argiope trifasciata6
  5. Giant Crab Spider Olios giganteus6
  6. Black Hairy Scorpion Hadrurus spadix5
  7. Apache Jumping Spider Phidippus apacheanus5
  8. Western Spotted Orbweaver Neoscona oaxacensis4
  9. Yellow Devil Scorpion Paravaejovis confusus4
  10. Cat-faced Orbweaver Araneus gemmoides3

Reptiles

  1. Common Side-blotched Lizard Uta stansburiana501
  2. Western Whiptail Aspidoscelis tigris380
  3. Plateau Fence Lizard Sceloporus tristichus255
  4. Long-nosed Leopard Lizard Gambelia wislizenii236
  5. Ornate Tree Lizard Urosaurus ornatus141
  6. Common Sagebrush Lizard Sceloporus graciosus88
  7. Gopher Snake Pituophis catenifer73
  8. Western Rattlesnake Crotalus oreganus29
  9. Eastern Collared Lizard Crotaphytus collaris25
  10. Striped Whipsnake Masticophis taeniatus23

Amphibians

  1. American Bullfrog Lithobates catesbeianus65
  2. Red-spotted Toad Anaxyrus punctatus40
  3. Great Basin Spadefoot Spea intermontana1
  4. Woodhouse's Toad Anaxyrus woodhousii1

Fish

  1. Green Sunfish Lepomis cyanellus21
  2. Red Shiner Cyprinella lutrensis16
  3. Northern Plains Killifish Fundulus kansae16
  4. Fathead Minnow Pimephales promelas4
  5. Speckled Dace Rhinichthys osculus2
  6. Black Bullhead Ameiurus melas1

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.