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Learn the wildlife of national parks

Learn the wildlife of El Impenetrable National Park

Chaco · Argentina

912 species have research-grade observations inside El Impenetrable 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. Chaco Chachalaca Ortalis canicollis40
  2. Blue-and-yellow Tanager Rauenia bonariensis31
  3. Great Antshrike Taraba major23
  4. Golden-winged Cacique Cacicus chrysopterus22
  5. White-fronted Woodpecker Melanerpes cactorum21
  6. Bluish-gray Saltator Saltator coerulescens18
  7. Plumbeous Ibis Theristicus caerulescens16
  8. Red-crested Cardinal Paroaria coronata16
  9. Cream-backed Woodpecker Campephilus leucopogon16
  10. Yellow-billed Cardinal Paroaria capitata15

Plants

  1. Neltuma kuntzei25
  2. Toothpick Cactus Stetsonia coryne24
  3. Wingleaf Soapberry Sapindus saponaria22
  4. Capparicordis tweedieana21
  5. Ceiba chodatii20
  6. Salta triflora18
  7. Chloroleucon tenuiflorum15
  8. Palo brea Parkinsonia praecox14
  9. Neltuma ruscifolia14
  10. Common White Quebracho Aspidosperma quebracho-blanco13

Mammals

  1. Chacoan Mara Dolichotis salinicola32
  2. Southern Brown Brocket Subulo gouazoubira30
  3. Southern Three-banded Armadillo Tolypeutes matacus12
  4. Capybara Hydrochoerus hydrochaeris12
  5. Collared Peccary Pecari tajacu10
  6. South American Tapir Tapirus terrestris9
  7. Common Tapeti Sylvilagus brasiliensis7
  8. Crab-eating Fox Cerdocyon thous6
  9. Crab-eating Raccoon Procyon cancrivorus4
  10. Black-and-gold Howler Monkey Alouatta caraya4

Insects

  1. White Peacock Anartia jatrophae14
  2. Melanis aegates11
  3. Great Southern White Ascia monuste9
  4. American Snout Libytheana carinenta6
  5. Little Dancer Metalmark Riodina lysippoides6
  6. Violet-winged Grasshopper Tropidacris collaris5
  7. Fiebrig's Stingless Bee Tetragonisca fiebrigi5
  8. Emesis ocypore4
  9. Deva yellow Eurema deva4
  10. Phystis simois4

Spiders and kin

  1. Aglaoctenus lagotis8
  2. Ancylometes concolor7
  3. Chaco Golden-knee Tarantula Grammostola pulchripes6
  4. Peucetia rubrolineata4
  5. Timogenes dorbignyi4
  6. Freya nigrotaeniata3
  7. Paradossenus longipes3
  8. Parawixia velutina3
  9. Centroctenus brevipes3
  10. Spinybacked Orbweaver Gasteracantha cancriformis2

Reptiles

  1. Broad-snouted Caiman Caiman latirostris44
  2. Painted Lancehead Bothrops diporus17
  3. Giant Ameiva Ameiva ameiva15
  4. Cope's Mabuya Notomabuya frenata14
  5. Four-toed Tegu Teius teyou10
  6. Spiny Lava Lizard Tropidurus spinulosus10
  7. Red Tegu Salvator rufescens8
  8. Banded Hognose Snake Xenodon pulcher6
  9. Etheridge's Lava Lizard Tropidurus etheridgei5
  10. Boa Constrictor Boa constrictor4

Amphibians

  1. Vizcacheras' White-lipped Frog Leptodactylus bufonius10
  2. Chaco Tree Frog Boana raniceps10
  3. Miranda's White-lipped Frog Leptodactylus macrosternum9
  4. Cururu Toad Rhinella diptycha8
  5. Mato Grosso Snouted Tree Frog Scinax acuminatus5
  6. Pale-legged Weeping Frog Physalaemus albonotatus4
  7. Marbled White-lipped Frog Leptodactylus elenae2
  8. Oven Frog Leptodactylus latinasus2
  9. Budgett's Frog Lepidobatrachus laevis2
  10. Dwarf Tree Frog Dendropsophus nanus2

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.