KnowKi

Learn the wildlife of any country

Learn the wildlife of the Netherlands

Europe

11,615 species have research-grade observations in the Netherlands on iNaturalist. KnowKi turns the most recorded into short lessons with real photos, so you can learn a country's wildlife from home.

Start this trip in KnowKi →
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 platyrhynchos8,983
  2. Eurasian Coot Fulica atra8,436
  3. Grey Heron Ardea cinerea7,468
  4. Greylag Goose Anser anser6,124
  5. Eurasian Jackdaw Coloeus monedula5,196
  6. Egyptian Goose Alopochen aegyptiaca5,181
  7. Black-headed Gull Chroicocephalus ridibundus4,964
  8. Great Crested Grebe Podiceps cristatus4,736
  9. European Herring Gull Larus argentatus4,380
  10. Great Cormorant Phalacrocorax carbo4,271

Plants

  1. Ground-ivy Glechoma hederacea2,022
  2. Lawn daisy Bellis perennis1,935
  3. Red campion Silene dioica1,882
  4. Red deadnettle Lamium purpureum1,746
  5. Great stinging nettle Urtica dioica1,742
  6. Purple loosestrife Lythrum salicaria1,697
  7. Lesser celandine Ficaria verna1,642
  8. Ragwort Jacobaea vulgaris1,559
  9. Garlic mustard Alliaria petiolata1,478
  10. Common yarrow Achillea millefolium1,437

Mammals

  1. Brown Hare Lepus europaeus1,709
  2. Western Roe Deer Capreolus capreolus1,518
  3. Harbor Seal Phoca vitulina1,345
  4. Common Hedgehog Erinaceus europaeus934
  5. Grey Seal Halichoerus grypus835
  6. European Rabbit Oryctolagus cuniculus820
  7. European Fallow Deer Dama dama742
  8. Eurasian Red Squirrel Sciurus vulgaris707
  9. European Mole Talpa europaea624
  10. Red Fox Vulpes vulpes386

Insects

  1. Asian Lady Beetle Harmonia axyridis6,220
  2. Red Admiral Vanessa atalanta4,687
  3. Seven-spotted Lady Beetle Coccinella septempunctata4,675
  4. Common Drone Fly Eristalis tenax4,385
  5. Speckled Wood Pararge aegeria4,336
  6. European Peacock Butterfly Aglais io3,811
  7. Large Yellow Underwing Noctua pronuba3,180
  8. Western Honey Bee Apis mellifera3,172
  9. Green Shield Bug Palomena prasina3,131
  10. Common Carder Bumble Bee Bombus pascuorum3,000

Spiders and kin

  1. Cross Orbweaver Araneus diadematus2,883
  2. Fencepost jumping spider Marpissa muscosa1,941
  3. European Nursery Web spider Pisaura mirabilis1,683
  4. Canestrini's Harvestman Opilio canestrinii1,213
  5. Wasp Spider Argiope bruennichi1,131
  6. Long-bodied Cellar Spider Pholcus phalangioides797
  7. Grey Cross Spider Larinioides sclopetarius639
  8. Zebra Jumping Spider Salticus scenicus611
  9. Walnut Orbweaver Nuctenea umbratica529
  10. False Black Widow Steatoda grossa519

Reptiles

  1. Sand Lizard Lacerta agilis831
  2. Common Slowworm Anguis fragilis556
  3. Barred Grass Snake Natrix helvetica419

Amphibians

  1. European Toad Bufo bufo2,023
  2. European Common Frog Rana temporaria1,757
  3. Smooth Newt Lissotriton vulgaris966
  4. Natterjack Toad Epidalea calamita410

Mollusks

  1. Brown-lipped Snail Cepaea nemoralis2,126
  2. Garden Snail Cornu aspersum2,120
  3. European Common Cuttlefish Sepia officinalis785
  4. Leopard Slug Limax maximus746
  5. Roman Snail Helix pomatia535
  6. Copse Snail Arianta arbustorum528
  7. Common Cockle Cerastoderma edule475
  8. Girdled Snail Hygromia cinctella448

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.

Start this trip in KnowKi →

Species lists and counts from research-grade observations on iNaturalist, as of October 2026. Free, with no ads, no account and no purchases.