Zhangixalus schlegelii
Silhouette: Jose Carlos Arenas-Monroy · PhyloPic
In 3 days ~10% in a week ~30%
Zhangixalus schlegelii (common names: Japanese gliding frog, Schlegel's green tree frog, Schlegel's flying frog, Schlegel's tree frog) is a species of frog in the family Rhacophoridae. It is endemic to Japan and found in Honshu, Shikoku, Kyushu as well as the Ryukyu Islands. It is named after Hermann Schlegel, a 19th-century German zoologist.
Males measure 32–43 mm (1.3–1.7 in) and females 43–53 mm (1.7–2.1 in) in snout–vent length. The males have yellowish white nuptial pads, darkly colored throat, and a pair of slit-like vocal openings. The webbing of the fingers and toes is not well developed; the finger tips have truncated discs with circummarginal grooves. The dorsal skin is almost completely smooth. The supra-tympanic fold is prominent, but there is no dorsolateral fold.
Rhacophorus schlegelii breed in underground foam nests: In Japan there is also a nest-making frog which is said to lay its eggs sometimes amongst leaves on bushes or trees. However, its usual habit is to make a nest in the ground as indicated in Fig. 3. Awakening from their winter sleep, the frogs crawl along the edges of rice fields and swamps and dig out holes above the... Wikipedia →
Recording0:06
Japan · 2025
© Oscar Thomas · XC995048 · CC BY-NC 4.0
Recording0:09
Japan · 2025
© 土屋さん · iNaturalist · CC BY-NC 4.0
Recording0:22
Japan · 2024
© masaki_ishihara · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Uminonakamichi Seaside Park | 🇯🇵 Japan | |
| 2 | Tama Zoological Park | 🇯🇵 Japan | |
| 3 | Marine World Uminonakamichi | 🇯🇵 Japan | |
| 4 | Asamushi Aquarium | 🇯🇵 Japan |
With luck
About 10% of wildlife watchers report a Schlegel's Green Tree Frog sighting in Tokyo on a given day, based on 42 verified sightings from GBIF citizen-science data. It is the 6th most-seen of the 11 amphibians we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report a Schlegel's Green Tree Frog in Tokyo on a given day, against under 5% in June to March, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Schlegel's Green Tree Frog sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 2 cities where we can rate Schlegel's Green Tree Frog sightings, Tokyo ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Osaka (Japan, about 10%).
GBIF citizen-science records
It is estimated from how often the Schlegel's Green Tree Frog is recorded against all the amphibians logged in Tokyo (42 verified sightings), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
