TAKAO 599 MUSEUM

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).

Ephemera japonica
Ephemera japonica Ephemeridae
They live in Hokkaido, main land Honsyu, Shikoku, Kyusyu.
They inhabit at the river basin in low mountain area and mountains, and at the grassy places in the area.
The body is brown color and they have lots of black diagonal lines (lines downward to the right when you see their head in the left) at the abdomen.
This line is the good point to distinguish Ephemera japonica from Mayfly.
Their tail is about twice as long as the body length and the wing veins are black in the transparent wing, which they use to fly slowly over river surface.
Their larvae live a life in the clear water of rives.
As imagines have degenerated mouth, they don’t eat bait.
Instead, they utilize all the nourishment that they have stored as much as they can; they use to act for breeding.
While breeding, lots of them are fallen into the river, consequently they also become the bait for birds and fishes. Flying fishers use many Mayfly-shaped lures as fake-bait

●Length  about 10 mm
●Adult Flight Season  June to about October
※Quotation from Mount Takao formula application
もっと見る 閉じる