KnowKi

Learn the wildlife of national parks

Learn the wildlife of Cabo Polonio National Park

Uruguay

521 species have research-grade observations inside Cabo Polonio 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.

Start this trip in KnowKi →
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 Oystercatcher Haematopus palliatus32
  2. Turkey Vulture Cathartes aura21
  3. Kelp Gull Larus dominicanus20
  4. Southern Lapwing Vanellus chilensis19
  5. Neotropic Cormorant Nannopterum brasilianum18
  6. Collared Plover Anarhynchus collaris13
  7. Lesser Yellowlegs Tringa flavipes12
  8. Common Miner Geositta cunicularia12
  9. Saffron Finch Sicalis flaveola11
  10. Hooded Siskin Spinus magellanicus11

Plants

  1. Sea fig Carpobrotus edulis26
  2. Eryngium sanguisorba17
  3. Large white petunia Petunia axillaris12
  4. Herb-of-Grace Bacopa monnieri12
  5. Cyperus trigynus12
  6. Dwarf sundew Drosera brevifolia10
  7. Senecio platensis10
  8. Field Paintbrush Castilleja arvensis9
  9. Tropical Black Sage Varronia curassavica9
  10. Lavender steps Senecio crassiflorus9

Mammals

  1. South American Fur Seal Arctocephalus australis90
  2. South American Sea Lion Otaria flavescens60
  3. Brazilian Guinea Pig Cavia aperea8
  4. Southern Elephant Seal Mirounga leonina5
  5. Brown Hare Lepus europaeus3
  6. Southern Long-nosed Armadillo Dasypus novemcinctus3
  7. Common Bottlenose Dolphin Tursiops truncatus2
  8. Subantarctic Fur Seal Arctocephalus tropicalis2
  9. Domestic Dog Canis familiaris2
  10. Domestic Cat Felis catus2

Insects

  1. Erythrodiplax nigricans11
  2. Southern Monarch Danaus erippus9
  3. Epistrophus White Morpho Morpho epistrophus8
  4. Heliconisa pagenstecheri7
  5. Brazilian Lady Vanessa braziliensis6
  6. Zoniopoda tarsata5
  7. Small-winged Gay's Mantis Coptopteryx gayi4
  8. Largus rufipennis4
  9. Dysschema centenaria4
  10. Scotobius pilularius4

Spiders and kin

  1. Parawixia audax2
  2. Parampheres bimaculatus2
  3. Bothriurus rochensis2
  4. Grey House Spider Badumna longinqua1
  5. Spinybacked Orbweaver Gasteracantha cancriformis1
  6. Silver Garden Orbweaver Argiope argentata1
  7. Lycosa erythrognatha1
  8. Chilean Tiger Spider Scytodes globula1
  9. Alpaida versicolor1
  10. Araneus lathyrinus1

Reptiles

  1. Striped Worm Lizard Ophiodes striatus5
  2. South American Hognose Snake Xenodon dorbignyi5
  3. Yellow-bellied Liophis Erythrolamprus poecilogyrus4
  4. Schreibers' Many-fingered Teiid Cercosaura schreibersii3
  5. Gunther's Striped Snake Lygophis anomalus3
  6. Argentine Black-and-white Tegu Salvator merianae3
  7. Patagonian Racer Philodryas patagoniensis3
  8. Keeled Sepia Snake Dryophylax hypoconia3
  9. Eastern Smooth-throated Lizard Liolaemus wiegmannii2
  10. Brazilian Green Racer Philodryas aestiva2

Amphibians

  1. Argentine Toad Rhinella arenarum17
  2. Montevideo Tree Frog Boana pulchella13
  3. Lesser Swimming Frog Pseudis minuta10
  4. Wrestler Frog Leptodactylus luctator10
  5. Argentine Snouted Tree Frog Scinax granulatus8
  6. Sanborn's Tree Frog Dendropsophus sanborni8
  7. Hensel's Swamp Frog Pseudopaludicola falcipes7
  8. Striped Snouted Tree Frog Scinax squalirostris6
  9. Oven Frog Leptodactylus latinasus2
  10. Weeping Frog Physalaemus biligonigerus2

Fish

  1. Grey Triggerfish Balistes capriscus3
  2. White Sea Catfish Genidens barbus3
  3. Largehead Hairtail Trichiurus lepturus2
  4. Brown Burrfish Chilomycterus spinosus2
  5. Whitemouth Croaker Micropogonias furnieri2
  6. Harvestfish Peprilus paru1
  7. Unicorn Leatherjacket Aluterus monoceros1
  8. Bluewing Searobin Prionotus punctatus1
  9. Atlantic Midshipman Porichthys porosissimus1
  10. Parona Leather Jack Parona signata1

Mollusks

  1. Brazilian Volute Pachycymbiola brasiliana10
  2. Ear ancilla Olivancillaria auricularia9
  3. Tehuelche scallop Aequipecten tehuelchus7
  4. Intertidal Zebra Snail Echinolittorina lineolata7
  5. Donax hanleyanus5
  6. Stramonita brasiliensis4
  7. Eucallista purpurata4
  8. Violet Sea Snail Janthina janthina3
  9. Glycymeris longior3
  10. Drymaeus papyraceus2

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.

Start this trip in KnowKi →

Species lists and counts from research-grade observations on iNaturalist, as of October 2026. Parks outside the U.S. are from the World Database on Protected Areas (UNEP-WCMC and IUCN, Protected Planet). KnowKi is not affiliated with the National Park Service or any park's managers. Free, with no ads, no account, and no purchases.