AmphibiaWeb - Zhangixalus owstoni


(Translations may not be accurate.)

Zhangixalus owstoni (Stejneger, 1907)
Owston's Green Tree Frog
family: Rhacophoridae
subfamily: Rhacophorinae
genus: Zhangixalus
Zhangixalus owstoni
© 2007 Dr. Peter Janzen (1 of 3)
Conservation Status (definitions)
IUCN Red List Status Account Least Concern (LC)
National Status None
Regional Status None
conservation needs Access Conservation Needs Assessment Report .


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Owston's Green Tree Frog is a relatively large frog. The mean snout to vent length for males is 45 mm (range 42-51) and for females it is 56 mm (range 50-67). This species has 7-9 vomerine teeth. Both the forelimb and hindlimb webbing are not well developed. In males, the nuptial pads are yellowish white. This species has a pair of slit-like vocal openings. The skin on the back of this species is smooth, and the throat is nearly smooth with scattered small granules. There is no dorsolateral fold but a supratympanic fold is prominent.

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Japan

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Zhangixalus owstoni is found on the islands of Ishikgakijima and Iriomotejima in Japan. This species inhabits forests in lowlands or mountainous regions.

This species is probably a close relative to Z. moltrechti from Taiwan. The mating call of this species is long, containing 20 pulses and lasting 1.6 seconds.


Maeda, N. and Matsui, M. (1990). Frogs and Toads of Japan, 2nd edition. Bun-Ichi Sogo Shuppan Co., Ltd., Tokyo, Japan.

Originally submitted by: Ambika Sopory (first posted 2001-10-22)
Edited by: Vance T. Vredenburg, Michelle S. Koo (2022-08-18)

Species Account Citation: AmphibiaWeb 2022 Zhangixalus owstoni: Owston's Green Tree Frog <> University of California, Berkeley, CA, USA. Accessed Jun 22, 2024.

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Citation: AmphibiaWeb. 2024. <> University of California, Berkeley, CA, USA. Accessed 22 Jun 2024.

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