Mt. Takao is considered one of the three major habitat of insects along with Minoo (Osaka prefecture) and Kibune (Kyoto prefecture) and it has long been loved by researchers of insects because of number of species and the easy access from the Metropolitan area. There are many insects first found in Mt. Takao and named after "Takao" such as Takao Shachihoko （Hiradonta takaonis Matsumura） and Takao medaka kamikiri (Stenhomalus takaosanus).
Main Region: Honshu, Shikoku, Kyushu and Nansei Islands.
Found in woods near rivers and grasslands along streams from flatlands to mountains.
Body color is light brown with distinct wing veins.
Fly in forests or over streams and feed on sap of sawtooth oak and juice of fruits.
Larvae live in slow-flowing upstream and feed on nymphs of ephemeroptera.
Often used as feeds for mountain stream fishing.
The final stage of larvae lives on ground and become pupa in soils near streams.
●Length about 45 to 55 mm
●Adults Flight Season May to about July
Found in woods near rivers and grasslands along streams from flatlands to mountains.
Body color is light brown with distinct wing veins.
Fly in forests or over streams and feed on sap of sawtooth oak and juice of fruits.
Larvae live in slow-flowing upstream and feed on nymphs of ephemeroptera.
Often used as feeds for mountain stream fishing.
The final stage of larvae lives on ground and become pupa in soils near streams.
●Length about 45 to 55 mm
●Adults Flight Season May to about July