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Description

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Rhacophorus arboreus is a relatively large treefrog with adult males smaller (42-60mm) than females (59-82mm). These frogs have large heads. They have well developed webbing on their hands but only moderate webbing on their toes. Digits terminate in truncated discs. Dorsally, these frogs are bright green with or without black or brown spots with black edges. Ventrally, they are white or cream with pale brown spots. The iris is orange to brownish red.

Reference

Wilkinson, J. (2003). ''Kinugasa flying frog, Rhacophorus arboreus.'' Grzimek's Animal Life Encyclopedia, Volume 6, Amphibians. 2nd edition. M. Hutchins, W. E. Duellman, and N. Schlager, eds., Gale Group, Farmington Hills, Michigan.

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Distribution and Habitat

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The Forest Green Treefrog can be found in Honshu, Japan, and the small island of Sado off northeastern Honshu. They can be found from sea level to mountainous regions at altitudes over 2,000 m. Outside of the breeding season, they can be found in trees and leaf litter. During breeding season, they can be found in ponds and rice fields. During winter, they hibernate under moss or shallow soil.
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Life History, Abundance, Activity, and Special Behaviors

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The diet consists of insects. The male's mating call consist of a series of two to six clicking sounds. After mating the female deposits eggs in a foam nest on vegetation near standing water. The female excretes an albumin-based fluid from her cloaca, which she beats with her hind legs to form the foam nest. She then lays 300-800 eggs into the nest, which the male subsequently fertilizes. The foam nest hardens, protecting the eggs from desiccation and predation. After the eggs hatch the foam softens, and the hatched larvae go into the standing water to begin their life cycle.
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Life History, Abundance, Activity, and Special Behaviors

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This species is protected and rare in its range.
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Relation to Humans

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The ponds where the frogs gather to breed have become tourist attractions.
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Zhangixalus arboreus

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Zhangixalus arboreus, also known as the forest green tree frog and Kinugasa flying frog, is a species of frog in the family Rhacophoridae endemic to Japan.

The natural habitats of Z. arboreus are subtropical or tropical moist lowland forest, freshwater marshes, and irrigated land. These small tree frogs spend their adult lives in trees and forests, and in breeding season gather around water sources to mate. They lay their eggs within a batch of sponge-like foam which is suspended from a tree branch, usually hanging over a pond, marsh, or slow-flowing stream. The tadpoles emerge from the eggs, wiggle their way out of the foam, and drop down into the water below. These batches of foam can often be seen hanging over ponds in the Japanese countryside in late spring. Sometimes the frogs mistakenly lay their eggs over inappropriate bodies of water, such as swimming pools, wells, or even buckets containing rainwater.

References

  1. ^ IUCN SSC Amphibian Specialist Group (2021). "Zhangixalus arboreus". IUCN Red List of Threatened Species. 2021: e.T58973A177226592. doi:10.2305/IUCN.UK.2021-1.RLTS.T58973A177226592.en. Retrieved 17 November 2021.

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Zhangixalus arboreus: Brief Summary

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Zhangixalus arboreus, also known as the forest green tree frog and Kinugasa flying frog, is a species of frog in the family Rhacophoridae endemic to Japan.

The natural habitats of Z. arboreus are subtropical or tropical moist lowland forest, freshwater marshes, and irrigated land. These small tree frogs spend their adult lives in trees and forests, and in breeding season gather around water sources to mate. They lay their eggs within a batch of sponge-like foam which is suspended from a tree branch, usually hanging over a pond, marsh, or slow-flowing stream. The tadpoles emerge from the eggs, wiggle their way out of the foam, and drop down into the water below. These batches of foam can often be seen hanging over ponds in the Japanese countryside in late spring. Sometimes the frogs mistakenly lay their eggs over inappropriate bodies of water, such as swimming pools, wells, or even buckets containing rainwater.

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