KnowKi

Learn the wildlife of the U.S. national parks

Learn the wildlife of Gateway Arch National Park

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358 species have research-grade observations inside Gateway Arch 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. American Robin Turdus migratorius219
  2. Canada Goose Branta canadensis106
  3. Red-winged Blackbird Agelaius phoeniceus92
  4. Mallard Anas platyrhynchos64
  5. Rock Pigeon Columba livia34
  6. Northern Cardinal Cardinalis cardinalis32
  7. Common Grackle Quiscalus quiscula28
  8. European Starling Sturnus vulgaris27
  9. House Sparrow Passer domesticus20
  10. Mourning Dove Zenaida macroura19

Plants

  1. Fragrant sumac Rhus aromatica28
  2. Eastern redbud Cercis canadensis17
  3. Baldcypress Taxodium distichum16
  4. White clover Trifolium repens16
  5. Common milkweed Asclepias syriaca15
  6. Henbit deadnettle Lamium amplexicaule14
  7. Mock strawberry Potentilla indica11
  8. American pokeweed Phytolacca americana10
  9. Butterweed Packera glabella9
  10. American burnweed Erechtites hieraciifolius9

Mammals

  1. Eastern Gray Squirrel Sciurus carolinensis101
  2. Eastern Cottontail Sylvilagus floridanus13
  3. Groundhog Marmota monax13
  4. Virginia Opossum Didelphis virginiana7
  5. Common Raccoon Procyon lotor1
  6. Eastern Fox Squirrel Sciurus niger1

Insects

  1. Western Honey Bee Apis mellifera80
  2. Monarch Danaus plexippus42
  3. Common Eastern Bumble Bee Bombus impatiens39
  4. Asian Lady Beetle Harmonia axyridis38
  5. Eastern Carpenter Bee Xylocopa virginica20
  6. Large Milkweed Bug Oncopeltus fasciatus17
  7. Viceroy Limenitis archippus17
  8. Spotted Cucumber Beetle Diabrotica undecimpunctata16
  9. Painted Lady Vanessa cardui14
  10. Pale Green Assassin Bug Zelus luridus14

Spiders and kin

  1. Tan Jumping Spider Platycryptus undatus10
  2. Peppered Jumping Spider Pelegrina galathea7
  3. Zebra Jumping Spider Salticus scenicus6
  4. Common Hentz Jumping Spider Hentzia palmarum6
  5. Yellow Garden Spider Argiope aurantia5
  6. Bold Jumping Spider Phidippus audax4
  7. Golden Jumping Spider Paraphidippus aurantius4
  8. Synageles venator3
  9. Furrow Orbweaver Larinioides cornutus2
  10. Pike Slender Jumper Marpissa pikei2

Reptiles

  1. Common Garter Snake Thamnophis sirtalis10
  2. DeKay's Brownsnake Storeria dekayi7
  3. Western Ratsnake Pantherophis obsoletus2

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.