The Hallowell’s tree frog – Okinawa

The Hallowell’s tree frog ( Hyla hallowellii ) is found on Okinawa, Amami and Tokunoshima Island.

  • Scientific name: Hyla hallowellii
  • Common name: Hallowell’s tree frog
  • Distribution: Ryukyu Islands
  • Habitat: Forests, grassy areas and farm fields near water.
  • Diet: Insects
  • Average size: 30mm-40mm
  • Color: Bright green with a white belly

The Hallowell’s tree frog is fairly common but not often seen.  The beautiful frog lives high above the ground in trees making it difficult to find and photograph.

The Hallowell's tree frog

The Hallowell’s tree frog

They are easy to locate during mating season. The male produces a fairly high pitch squeak sound over and over.

The Hallowell's tree frog

The Hallowell’s tree frog -vocal sac

The Hallowell's tree frog

The Hallowell’s tree frog -mating call

The Hallowell's tree frog

The Hallowell’s tree frog

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Let’s protect the wildlife of the Ryukyu Islands.

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

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Ryukyu Kajika frog- skin discoloration

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.

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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

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tadpole transformation- metamorphosis

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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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