Ryukyu Kajika frog – Amphibians of the Ryukyu Islands

The Ryukyu Kajika frog (  Buergeria japonica ) is found throughout the Ryukyu Islands. It is the most common frog found on Okinawa.

  • Scientific name: Buergeria japonica
  • Common name: Ryukyu Kajika frog
  • Distribution: Ryukyu Islands
  • Habitat: Forests, mountain slopes, drainage ditches and farm fields.
  • Diet: Small Insects
  • Average size: 25mm-40mm
  • Color: Olive green, brown and golden yellow

This small frog is a master of camouflage. I often find it on rocks, plants, trees, drainage ditches and even our trash.

Ryukyu Kajika frog on tatami mat

Ryukyu Kajika frog on tatami mat

Ryukyu Kajika frog

Ryukyu Kajika frog -macro

Ryukyu Kajika frog

Ryukyu Kajika frog – blending in

Ryukyu Kajika frog

Ryukyu Kajika frog

Ryukyu Kajika frog

Ryukyu Kajika frog- man hole cover


Ryukyu Kajika frog- skin discoloration

Kajika frog -Iriomote Island

Kajika frog -Iriomote Island

Photographed on white for the Meet Your Neighbours Project

Ryukyu Kajika frog - MYN

Ryukyu Kajika frog – MYN

The males turn a golden yellow during mating season. The season stretches from April to September on Okinawa.


Ryukyu Kajika frog – mating

Ryukyu Kajika frog

Ryukyu Kajika frog – drainage ditch

The eggs are laid in slow moving and still water sources. The eggs will develop into tadpoles and eventually transform into baby frogs.  I often find tadpoles thriving in farming water buckets.

Ryukyu Kajika frog

Ryukyu Kajika frog -tadpoles


tadpole transformation- metamorphosis


Juvenile Kajika frog

The summer months provide a great opportunity for natural predators.The frogs come together in a large numbers.

Crab feeding on frogs

Crab feeding on frogs

Ryukyu Kajika frog

Pryer’s keelback feeding

If you see frogs, there is a possibility that snakes are near by. The snakes patiently wait for frogs in drainage ditches and still water sources. The Kajika frog is the Hime habu’s favorite meal.

Hime habu - GoPro

Hime habu – GoPro

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Asian grass frog – Amphibians of the Ryukyu Islands

The Asian grass frog  ( Fejervarya limnocharis ) is found on Mainland Japan and most of the Ryukyu Islands. The warty frog is fairly common on Okinawa. It’s biggest threats are pesticide exposure and habitat loss.

  • Scientific name: Fejervarya limnocharis
  • Common name: Asian grass frog, marsh frog and common pond frog
  • Distribution: Ryukyu Islands and Mainland Japan
  • Habitat: Rice fields, ditches, marshes, parks and farm fields.
  • Diet: Insects
  • Average size: 45mm-75mm
  • Color: light brown with a white belly
Asian grass frog - 60mm macro

Asian grass frog – Canon 70d * 60mm macro

Wide angle macro - Canon 70d *Tokina fisheye

Wide angle macro – Canon 70d *Tokina fisheye


Asian grass frog- Macro

Asian marsh frog - drainage ditch

Asian marsh frog – drainage ditch

Asian marsh frog

Asian marsh frog

Asian grass frog feeding

Asian grass frog feeding

Asian marsh frog - Okuma resort

Asian marsh frog – Okuma resort

Asian grass frog -MYN

Asian grass frog -MYN

Egret feeding -the last goodbye

Egret feeding -the last goodbye

Have a great day!

Protecting Okinawa’s endangered beetles – Yanbaru forest

Poaching has been a big problem in northern Okinawa. The endemic animals of the Yanbaru forest are highly valued in the exotic pet trade market.  The Okinawan Ministry of the Environment and the wildlife protection center are working hard this year to prevent the poaching of these endangered species. The Okinawan’s are spreading the word in the news, local papers, flyers and even monitoring the forest roads at night.

Poaching flyer - Yanbaru

Poaching flyer -Yanbaru

August through September is when people search the forest for the rare Yanbaru long-armed scarab beetle (Cheirotonus jambar). If you see anyone taking this protected species please contact the authorities.  I have yet to photograph a live animal. It is one of the rarest beetles in the world.

Rarest beetle in Japan -Yanbaru long-armed scarab beetle

Rarest beetle in Japan -Yanbaru long armed scarab beetle, wildlife center

The giant Okinawan stag beetle (Dorcus titanus okinawanus) is also a high prized specimen in the pet trade.

Giant okinawan stag beetles

Giant okinawan stag beetles


Giant okinawan stag beetle 

Beetle collectors use fruit filled net traps to lure in the beetles.

Yanbaru beetle trap

Yanbaru beetle trap    (Dorcus titanus okinawanus)

The beetles hooked shaped arms get caught in the netting.

Giant stag beetle ( Dorcus titanus okinawanus )

Giant stag beetle (Dorcus titanus okinawanus)

Over the years, I have found a few traps with dead beetles attached.

dead beetle

Female okinawan stag beetle

Beetle collecting is popular in Okinawa. Its important to be familiar with the specific beetles that are protected species. Let’s protect the wildlife of the Yanbaru forest for future generations.




Marine Life Washed Ashore – Typhoon Vongfong

Super Typhoon Vongfong was considered to be to be the strongest storm of the year. We were very lucky the strength of the storm died down before it landed on the Island of Okinawa. The typhoon brought heavy winds and rough sea conditions. A fair amount of marine life could not cope with these harsh conditions.

Puffer fish and trash

A Common Puffer fish ( Diodon holocanthus) with beach trash.

Blue starfish ,Onna beach-Okinawa

Blue starfish (Linckia laevigata) washed ashore

fish washed up with styrofoam

Carinalfish washed ashore with styrofoam in its mouth

Sea snake , Okinawa-Japan

Venomous Sea snake  (Emydocephalus ijimae)

Starfish washed up

Horned sea star ( Protoreaster nodusus ) washed ashore

sea hare

Large sea slug (Dolabella auricularia ) with internal shell

Sea cucumber

Sea cucumber ( Holothuria scabra ) washed ashore

Soft coral -Nago ,Bay

Soft coral  ( Lobophytum sp ) washed ashore

All images were taken on the western portion of the Island using the Canon 70d.

Have a great day!