How big is the Japanese tree frog?

Adults typically measure 2.0 to 4.5 cm in body length, with females larger than males, which are usually under 4 cm.

Why does the Japanese tree frog sometimes call during the day?

Beyond its breeding-season calls, it is known for "rain calling," vocalizing even in daytime when rain is approaching.

How does the Japanese tree frog climb smooth surfaces like glass?

Round adhesive pads on each toe allow it to grip smooth vertical surfaces and leap between branches.

Japanese Tree Frogニホンアマガエル

Dryophytes japonicusLC— Least Concern

The Japanese tree frog is a small, adaptable frog native to Japan, the Korean Peninsula, and eastern China, commonly found in forests, wetlands, and rice paddies. It grows to only about 2-4.5 cm long, can shift its skin color to blend with its surroundings, and preys on small insects and spiders. Widespread and stable in the wild, it is listed as Least Concern by the IUCN.

Japanese Tree Frog (reference photo) — Photo: Yerpo / CC BY-SA 4.0 / Source / cropped

Species Data

Classification: Anura / Hylidae Source
Distribution: Native to Japan (Hokkaido, Honshu, Shikoku, and Kyushu), the Korean Peninsula, and eastern China, inhabiting forests, wetlands, and rice paddies near water. Source

Did You Know?

It can change its skin color from green to a mottled grayish-brown to blend in with its surroundings. Source
It is known for "rain calling" — vocalizing even outside the breeding season, including during the day, when rain is approaching. Source
Round adhesive pads on every toe let it leap between branches and cling to smooth vertical surfaces such as glass. Source

Where to See This Species

2 facilities · 0 individuals

桐生が岡動物園 (Kiryuugaoka Doubutsuen)Gunma自動車の場合、カーナビ検索は「桐生が岡動物園」ではなく「桐生が岡遊園地」で設定すると駐車場に到着できる（動物園名で検索すると誤った経路になる場合がある）。

桐生が岡動物園のWikipedia記事に飼育種として記載 Source

Higashiyama Zoo and Botanical GardensAichiOpened in 1937

名古屋市東山動物園のWikipedia記事に飼育種として記載 Source

Conservation Story

Conservation Status

IUCNではLC（低懸念）です。地域の水田や水辺を保つことが生息の基盤になります。

Habitat

水田、池、湿地、草地、低木地。

Threats

水田と水辺の減少
農薬などによる環境変化
湿地の改変

Conservation & Breeding Efforts

里山と水田環境の保全
繁殖期の水辺の維持
身近な両生類を伝える教育展示

Sources

ja.wikipedia.org en.wikipedia.org

Support Conservation

A visit is a small, positive way to support the daily lives of the animals you care about.

Visit: A visit itself helps support the facility.
Animal Supporter Programs & Giving: Find ways to support the facility through its official website.
Furusato Nozei: Municipally run facilities may share official guidance for this Japanese hometown-tax program.

FAQ

How big is the Japanese tree frog?: Adults typically measure 2.0 to 4.5 cm in body length, with females larger than males, which are usually under 4 cm. Source
Why does the Japanese tree frog sometimes call during the day?: Beyond its breeding-season calls, it is known for "rain calling," vocalizing even in daytime when rain is approaching. Source
How does the Japanese tree frog climb smooth surfaces like glass?: Round adhesive pads on each toe allow it to grip smooth vertical surfaces and leap between branches. Source

Source: ja.wikipedia.org en.wikipedia.org