KnowKi

Learn the wildlife of any country

Learn the wildlife of Guam

Oceania

2,273 species have research-grade observations in Guam 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. Blue-billed White-Tern Gygis candida66
  2. Eurasian Tree Sparrow Passer montanus62
  3. Micronesian Starling Aplonis opaca60
  4. Red Junglefowl Gallus gallus58
  5. Philippine Collared-Dove Streptopelia dusumieri49
  6. Black Drongo Dicrurus macrocercus47
  7. Yellow Bittern Botaurus sinensis44
  8. Black Noddy Anous minutus38
  9. Pacific Reef Heron Egretta sacra37
  10. Pacific Golden-Plover Pluvialis fulva31

Plants

  1. Coconut palm Cocos nucifera1,580
  2. Tridax Daisy Tridax procumbens558
  3. Micronesian Cycad Cycas micronesica113
  4. Bamboo Orchid Arundina graminifolia96
  5. Beach naupaka Scaevola taccada96
  6. White leadtree Leucaena leucocephala95
  7. Safford's leafflower Phyllanthus saffordii89
  8. Thatch screwpine Pandanus tectorius80
  9. Noni Morinda citrifolia80
  10. Coral Vine Antigonon leptopus74

Insects

  1. Blue-banded King Crow Butterfly Euploea eunice299
  2. Giant Asian Mantis Hierodula patellifera252
  3. Gulf Fritillary Dione vanillae233
  4. Common Mormon Swallowtail Papilio polytes168
  5. Rectimarginalis fuscospinosa151
  6. Stenocatantops splendens148
  7. Coconut Rhinoceros Beetle Oryctes rhinoceros141
  8. Western Honey Bee Apis mellifera139
  9. Midway emerald beetle Protaetia pryeri128
  10. Oriental Flower Beetle Protaetia orientalis103

Spiders and kin

  1. Hawaiian Garden Spider Argiope appensa1,200
  2. Dome Web Spider Cyrtophora moluccensis90
  3. Pantropical Huntsman Spider Heteropoda venatoria80
  4. Common Web-spider Neoscona theisi38
  5. Orange-and-black Pear Spider Leucauge fastigata32
  6. Gray Wall Jumping Spider Menemerus bivittatus29

Reptiles

  1. Island Rainbow Skink Carlia ailanpalai185
  2. Mariana Monitor Varanus tsukamotoi124
  3. Pacific Bluetail Skink Emoia caeruleocauda109
  4. Green Anole Anolis carolinensis103
  5. Green Sea Turtle Chelonia mydas96
  6. Mourning Gecko Lepidodactylus lugubris89
  7. Brown Tree Snake Boiga irregularis84
  8. Asian House Gecko Hemidactylus frenatus71
  9. Pacific Dtella Gehyra oceanica31
  10. Slevin's Emo Skink Emoia slevini17

Fish

  1. Tracey's Damselfish Chrysiptera traceyi190
  2. Pacific Bullethead Parrotfish Chlorurus spilurus145
  3. Spotted Toby Canthigaster solandri121
  4. Blackback Anemonefish Amphiprion melanopus97
  5. Lagoon Triggerfish Rhinecanthus aculeatus97
  6. Threespot Wrasse Halichoeres trimaculatus90
  7. Moorish Idol Zanclus cornutus88
  8. Orangestripe Triggerfish Balistapus undulatus85
  9. Blackspotted Puffer Arothron nigropunctatus85
  10. Pacific Double-saddle Butterflyfish Chaetodon ulietensis80

Mollusks

  1. African Giant Snail Lissachatina fulica128
  2. Small Giant Clam Tridacna maxima115
  3. Radiolate Partula Partula radiolata91
  4. Cuban Leaf Slug Veronicella cubensis85
  5. Lined Treesnail Mesembrinus multilineatus70
  6. Satsuma succincta69
  7. Day Octopus Octopus cyanea49
  8. Phyllidia guamensis43
  9. Blue Dragon Pteraeolidia semperi42
  10. Tiger Cowrie Cypraea tigris32

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.