Short（短編）

(Hiraodai) It is called one of Japan's three major karsts and is designated as a national natural monument.

The flow of the stream and the cries of larks, pheasants, warblers, etc.(Partially recorded)

（平尾台）日本三大カルストと呼ばれ、国の天然記念物にも指定されてます。

小川の流れと、ヒバリ、キジ、ウグイス等の鳴き声（一部収録）

* There is also a paid version of "Sound in Nature" which is rich in episodes and has a long version.(Apple podcast only)

ロングバージョンのある有料版「Sound in Nature」もあります。

https://podcasts.apple.com/us/podcast/sound-in-nature/id1569798616