Treasures of Mt. Takao

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).

Davidius fujiama
Davidius fujiama Gomphidae
Main region: Honshu, Shikoku and Kyushu.
Found at clear streams near headstreams and streamside from low elevations to mountains.
Is very similar to davidius nanus but abdomen of male davidius fujiama is mostly black as its Japanese name Kuro-Sanae literally meaning black gomphinae states and no yellow patterns on sides of thorax.
Middle yellow spots on sides of thorax are smaller and the base of front legs does not have yellow spots so it is easy to identify the difference.
Female hovers and lay eggs on moss or low-growing plants around waterside.
Main foods are small insects.
Emerge from April, adults can be seen until summer.

●Length  about 40 to 50 mm
●Adult Flight Season  April to about July
※Quotation from Mount Takao formula application
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