AmphibiaWeb - Zhangixalus owstoni
Zhangixalus owstoni
Owston's Green Tree Frog
family: Rhacophoridae
subfamily: Rhacophorinae
genus: Zhangixalus

© 2007 Dr. Peter Janzen (1 of 3)
Conservation Status (definitions)
IUCN Red List Status Account Least Concern (LC)
National Status None
Regional Status None
Access Conservation Needs Assessment Report .



View distribution map in BerkeleyMapper.

R. owstoni has a relatively large body. This species has 7-9 vomerine teeth. Both the forelimb and hindlimb webbing are not well developed. The mean snout to vent length for males is 45 mm (range 42-51) and for females it is 56 mm (range 50-67). 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 smotth 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


View distribution map in BerkeleyMapper.
R. 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 R. moltrechti from Taiwan. The mating call of R. owstoni 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 Vredenburg (2001-12-18)

Species Account Citation: AmphibiaWeb 2001 Zhangixalus owstoni: Owston's Green Tree Frog <> University of California, Berkeley, CA, USA. Accessed Aug 10, 2022.

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Citation: AmphibiaWeb. 2022. <> University of California, Berkeley, CA, USA. Accessed 10 Aug 2022.

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