KnowKi

Learn the wildlife of national parks

Learn the wildlife of El Rey National Park

Argentina

305 species have research-grade observations inside El Rey 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. Red-legged Seriema Cariama cristata34
  2. Yungas Guan Penelope bridgesi32
  3. Scaly-headed Parrot Pionus maximiliani15
  4. Plush-crested Jay Cyanocorax chrysops12
  5. Buff-necked Ibis Theristicus caudatus10
  6. Rufous-bellied Thrush Turdus rufiventris9
  7. Crested Oropendola Psarocolius decumanus8
  8. Green-cheeked Parakeet Pyrrhura molinae8
  9. Picazuro Pigeon Patagioenas picazuro6
  10. Roadside Hawk Rupornis magnirostris6

Plants

  1. Brazilian vaseplant Aechmea distichantha14
  2. Tropical milkweed Asclepias curassavica5
  3. Tree tobacco Nicotiana glauca4
  4. Ruellia erythropus4
  5. Herzog cestrum Lycium cestroides4
  6. Aphelandra hieronymi4
  7. Tillandsia tenuifolia3
  8. Mock strawberry Potentilla indica3
  9. Southern Giant Horsetail Equisetum giganteum3
  10. Pfeiffera monacantha3

Mammals

  1. Southern Brown Brocket Subulo gouazoubira11
  2. Crab-eating Raccoon Procyon cancrivorus4
  3. Southern Tamandua Tamandua tetradactyla2
  4. Agile Gracile Opossum Gracilinanus agilis1
  5. Common Tapeti Sylvilagus brasiliensis1

Insects

  1. Cyan Emperor Doxocopa cyane21
  2. Ortilia gentina13
  3. Cybdelis petronita13
  4. Telenassa berenice11
  5. Thoas Swallowtail Heraclides thoas7
  6. Southern Guava Skipper Phocides polybius6
  7. Ithra Crescent Ortilia ithra6
  8. Mnesarete grisea5
  9. Argia joergenseni5
  10. Southern Sicklewing Eantis thraso5

Spiders and kin

  1. Centroctenus brevipes3
  2. Aglaoctenus lagotis2
  3. Brown Widow Latrodectus geometricus1
  4. Brazilian Wandering Spider Phoneutria nigriventer1
  5. Common House Spider Parasteatoda tepidariorum1
  6. Cayenne Tick Amblyomma cajennense1

Reptiles

  1. Schreibers' Many-fingered Teiid Cercosaura schreibersii2
  2. Brazilian Green Racer Philodryas aestiva2
  3. Jan's Green Racer Philodryas varia1
  4. Brown Leaf Lizard Stenocercus caducus1
  5. Wagler's Snake Xenodon merremii1

Amphibians

  1. Argentine Toad Rhinella arenarum2
  2. Fuscous-blotched Snouted Tree Frog Scinax fuscovarius1
  3. Cururu Toad Rhinella diptycha1
  4. Rioja Tree Frog Boana riojana1

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. 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.