KnowKi

Learn the wildlife of any country

Learn the wildlife of Croatia

Europe

11,423 species have research-grade observations in Croatia on iNaturalist. KnowKi turns the most recorded into short lessons with real photos, so you can learn a country's wildlife from home.

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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. Yellow-legged Gull Larus michahellis2,340
  2. Mallard Anas platyrhynchos1,366
  3. European Shag Gulosus aristotelis1,290
  4. Hooded Crow Corvus cornix1,179
  5. White Stork Ciconia ciconia1,158
  6. Eurasian Blackbird Turdus merula1,148
  7. Rock Pigeon Columba livia1,075
  8. Grey Heron Ardea cinerea947
  9. Barn Swallow Hirundo rustica941
  10. Common Chaffinch Fringilla coelebs881

Plants

  1. Rock samphire Crithmum maritimum1,769
  2. Common snowdrop Galanthus nivalis1,762
  3. Common ivy Hedera helix1,420
  4. Lawn daisy Bellis perennis1,350
  5. Rough Bindweed Smilax aspera1,317
  6. Holm oak Quercus ilex1,216
  7. Green-winged orchid Anacamptis morio1,180
  8. Mastic Pistacia lentiscus1,119
  9. Common fig Ficus carica1,115
  10. Rustyback Asplenium ceterach1,091

Mammals

  1. Wild Boar Sus scrofa1,441
  2. Western Roe Deer Capreolus capreolus1,010
  3. Red Deer Cervus elaphus894
  4. Red Fox Vulpes vulpes771
  5. European Fallow Deer Dama dama672
  6. Eurasian Beaver Castor fiber479
  7. Northern White-breasted Hedgehog Erinaceus roumanicus425
  8. Common Bottlenose Dolphin Tursiops truncatus396
  9. European Badger Meles meles357
  10. Eurasian Otter Lutra lutra347

Insects

  1. European Mantis Mantis religiosa2,226
  2. Scarce Swallowtail Iphiclides podalirius1,871
  3. Egyptian Bird Grasshopper Anacridium aegyptium1,839
  4. Schmidt's Marbled Bush-cricket Eupholidoptera schmidti1,524
  5. European Stag Beetle Lucanus cervus1,384
  6. Italian locust Calliptamus italicus1,342
  7. Southern White Admiral Limenitis reducta1,222
  8. Ash Cicada Cicada orni1,201
  9. European Rose Chafer Cetonia aurata1,137
  10. Western Honey Bee Apis mellifera980

Spiders and kin

  1. Radiated Wolf Spider Hogna radiata801
  2. Red-bellied Jumping Spider Philaeus chrysops666
  3. Wasp Spider Argiope bruennichi526
  4. Half-edged Wall Jumping Spider Menemerus semilimbatus456
  5. Cross Orbweaver Araneus diadematus424
  6. Heather crab spider Thomisus onustus323
  7. Mediterranean white-banded spider Evarcha jucunda321
  8. Lobed Argiope Argiope lobata312
  9. Napoleon Spider Synema globosum247
  10. Mediterranean Spiny False Wolf Spider Zoropsis spinimana242

Reptiles

  1. Italian Wall Lizard Podarcis siculus3,250
  2. Dalmatian Wall Lizard Podarcis melisellensis1,978
  3. Common Wall Lizard Podarcis muralis1,633
  4. Mediterranean House Gecko Hemidactylus turcicus1,291
  5. Hermann's Tortoise Testudo hermanni1,147
  6. Sharp-snouted Rock Lizard Dalmatolacerta oxycephala785
  7. Blue-throated Keeled Lizard Algyroides nigropunctatus707
  8. Grass snake Natrix natrix662
  9. Balkan Whip Snake Hierophis gemonensis656
  10. European Glass Lizard Pseudopus apodus644

Amphibians

  1. Fire Salamander Salamandra salamandra952
  2. European Toad Bufo bufo784
  3. Green Toad Bufotes viridis620
  4. Yellow-bellied Toad Bombina variegata484
  5. Marsh Frog Pelophylax ridibundus425
  6. Agile Frog Rana dalmatina399
  7. European Tree Frog Hyla arborea247

Fish

  1. Painted Comber Serranus scriba1,339
  2. Common Two-banded Seabream Diplodus vulgaris1,164
  3. Salema Porgy Sarpa salpa1,088
  4. East Atlantic Peacock Wrasse Symphodus tinca1,048
  5. Mediterranean Damselfish Chromis chromis1,007
  6. Mediterranean Rainbow Wrasse Coris julis953
  7. Saddled Seabream Oblada melanurus870
  8. Red-black Triplefin Tripterygion tripteronotum629
  9. Rusty Blenny Parablennius sanguinolentus608
  10. White Sea Bream Diplodus sargus517

Mollusks

  1. Chocolate-band Snail Eobania vermiculata759
  2. Garden Snail Cornu aspersum637
  3. Turbinate Monodont Phorcus turbinatus519
  4. Roman Snail Helix pomatia479
  5. Banded Dye-murex Hexaplex trunculus448
  6. Green Ormer Haliotis tuberculata419
  7. European Common Cuttlefish Sepia officinalis403
  8. Rhyssoplax olivacea379
  9. Noble Pen Shell Pinna nobilis275
  10. Round-mouthed Snail Pomatias elegans275

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. Free, with no ads, no account and no purchases.