KnowKi

Learn the wildlife of national parks

Learn the wildlife of Plitvička jezera National Park

Croatia

1,452 species have research-grade observations inside Plitvička jezera 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. Mallard Anas platyrhynchos233
  2. Common Chaffinch Fringilla coelebs151
  3. Common Merganser Mergus merganser89
  4. European Robin Erithacus rubecula80
  5. Great Tit Parus major74
  6. Eurasian Nuthatch Sitta europaea51
  7. Eurasian Blackbird Turdus merula37
  8. Song Thrush Turdus philomelos32
  9. Grey Heron Ardea cinerea31
  10. Eurasian Jay Garrulus glandarius26

Plants

  1. European Cyclamen Cyclamen purpurascens302
  2. Smokebush Cotinus coggygria207
  3. Hart's-tongue fern Asplenium scolopendrium203
  4. Spring Heath Erica carnea125
  5. European beech Fagus sylvatica123
  6. Swamp Sawgrass Cladium mariscus110
  7. European mistletoe Viscum album109
  8. Hemp agrimony Eupatorium cannabinum99
  9. Maidenhair spleenwort Asplenium trichomanes95
  10. Yellow Thistle Cirsium erisithales92

Mammals

  1. Bank Vole Clethrionomys glareolus25
  2. Eurasian Beaver Castor fiber18
  3. Eurasian Red Squirrel Sciurus vulgaris13
  4. Brown Bear Ursus arctos6

Insects

  1. Beautiful Demoiselle Calopteryx virgo202
  2. Silver-washed Fritillary Argynnis paphia71
  3. Common Blue Damselfly Enallagma cyathigerum70
  4. Nine-spotted Moth Amata phegea57
  5. Large Skipper Ochlodes sylvanus57
  6. Scarce Chaser Libellula fulva47
  7. Keeled Skimmer Orthetrum coerulescens46
  8. Small Pincertail Onychogomphus forcipatus44
  9. Blue Featherleg Platycnemis pennipes40
  10. Banded Demoiselle Calopteryx splendens37

Spiders and kin

  1. Cross Orbweaver Araneus diadematus22
  2. Red-bellied Jumping Spider Philaeus chrysops8
  3. Goldenrod Crab Spider Misumena vatia6

Reptiles

  1. Tessellated Water Snake Natrix tessellata194
  2. Green Lizard Lacerta viridis77
  3. Common Wall Lizard Podarcis muralis32
  4. Grass snake Natrix natrix31
  5. Common Slowworm Anguis fragilis26
  6. Long-nosed Viper Vipera ammodytes21
  7. Horvath's Rock Lizard Iberolacerta horvathi19
  8. Smooth Snake Coronella austriaca11
  9. Sand Lizard Lacerta agilis5

Amphibians

  1. Fire Salamander Salamandra salamandra104
  2. European Toad Bufo bufo37
  3. Marsh Frog Pelophylax ridibundus33
  4. Agile Frog Rana dalmatina15
  5. European Common Frog Rana temporaria7
  6. Smooth Newt Lissotriton vulgaris7

Fish

  1. European Chub Squalius cephalus302
  2. Northern Pike Esox lucius134
  3. Common Rudd Scardinius erythrophthalmus40
  4. Balkan Italic Minnow Phoxinus lumaireul18
  5. Rainbow Trout Oncorhynchus mykiss5
  6. Brown Trout Salmo trutta4

Mollusks

  1. Roman Snail Helix pomatia33
  2. Ash-black Slug Limax cinereoniger25
  3. Brown-lipped Snail Cepaea nemoralis18

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.