KnowKi

Learn the wildlife of any country

Learn the wildlife of Bulgaria

Europe

8,702 species have research-grade observations in Bulgaria 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. Common Chaffinch Fringilla coelebs710
  2. Eurasian Jay Garrulus glandarius672
  3. Great Tit Parus major659
  4. Hooded Crow Corvus cornix592
  5. Red-backed Shrike Lanius collurio554
  6. White Stork Ciconia ciconia542
  7. Eurasian Blackbird Turdus merula503
  8. Yellow-legged Gull Larus michahellis500
  9. European Starling Sturnus vulgaris485
  10. Great Spotted Woodpecker Dendrocopos major474

Plants

  1. Tree-of-heaven Ailanthus altissima423
  2. Chicory Cichorium intybus271
  3. Old man's beard Clematis vitalba230
  4. Jerusalem Thorn Paliurus spina-christi212
  5. Red deadnettle Lamium purpureum208
  6. Green-winged orchid Anacamptis morio204
  7. Common Mallow Malva sylvestris186
  8. Dwarf Elder Sambucus ebulus182
  9. Woolly Foxglove Digitalis lanata176
  10. Black locust Robinia pseudoacacia172

Mammals

  1. Eurasian Red Squirrel Sciurus vulgaris404
  2. Northern White-breasted Hedgehog Erinaceus roumanicus267
  3. Domestic Cat Felis catus195
  4. Golden Jackal Canis aureus109
  5. European Badger Meles meles98
  6. European Ground Squirrel Spermophilus citellus97
  7. Western Roe Deer Capreolus capreolus96
  8. Northern Chamois Rupicapra rupicapra88
  9. Red Fox Vulpes vulpes84

Insects

  1. Common Blue Polyommatus icarus1,132
  2. Nutmeg Moth Anarta trifolii1,027
  3. Beaded Chestnut Agrochola lychnidis993
  4. Cotton Bollworm Moth Helicoverpa armigera922
  5. Asian Lady Beetle Harmonia axyridis829
  6. Queen of Spain Fritillary Issoria lathonia738
  7. Seven-spotted Lady Beetle Coccinella septempunctata674
  8. Transcaucasian Giant Mantis Hierodula transcaucasica659
  9. Meadow Brown Maniola jurtina631
  10. Four-spotted Moth Tyta luctuosa631

Spiders and kin

  1. Radiated Wolf Spider Hogna radiata330
  2. Wasp Spider Argiope bruennichi253
  3. Heather crab spider Thomisus onustus248
  4. Cross Orbweaver Araneus diadematus228
  5. Red-bellied Jumping Spider Philaeus chrysops189
  6. Goldenrod Crab Spider Misumena vatia133
  7. Half-edged Wall Jumping Spider Menemerus semilimbatus123
  8. Marbled Cellar Spider Holocnemus pluchei120
  9. Napoleon Spider Synema globosum110
  10. Crimean Banner-legged Jumping Spider Saitis tauricus102

Reptiles

  1. Green Lizard Lacerta viridis700
  2. Common Wall Lizard Podarcis muralis626
  3. Hermann's Tortoise Testudo hermanni390
  4. Greek Tortoise Testudo graeca345
  5. European Pond Turtle Emys orbicularis258
  6. Tessellated Water Snake Natrix tessellata241
  7. Mediterranean Thin-toed Gecko Mediodactylus danilewskii238
  8. Grass snake Natrix natrix211
  9. Kotschy's Gecko Mediodactylus kotschyi176
  10. Caspian Whipsnake Dolichophis caspius168

Amphibians

  1. Eastern Tree Frog Hyla orientalis634
  2. Green Toad Bufotes viridis407
  3. Fire Salamander Salamandra salamandra327
  4. Marsh Frog Pelophylax ridibundus326
  5. European Toad Bufo bufo233
  6. European Common Frog Rana temporaria167
  7. Yellow-bellied Toad Bombina variegata143
  8. Agile Frog Rana dalmatina130

Mollusks

  1. Turkish Snail Helix lucorum639
  2. Striped Venus Chamelea gallina357
  3. Kagoshima Blood Cockle Anadara kagoshimensis351
  4. Veined Rapa Whelk Rapana venosa263
  5. Mediterranean Mussel Mytilus galloprovincialis211
  6. Wedge Clam Donax trunculus163
  7. Vineyard Snail Caucasotachea vindobonensis126
  8. Lagoon Cockle Cerastoderma glaucum84

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.