On July 13, the announcement of the "Tokyo Regional Shiokara Dragonfly First View", one of the Japan Meteorological Agency's biological seasonal observation information.
It's 13 days later than normal and 4 days later than last year.
I came to see the so-called "Shiokara dragonfly" at nearby Tsukuda Park.
When both male and female are immature, the body is pale brown and black spots, and the compound eyes are light brown, but the color of the body and compound eyes changes depending on the degree of maturity.
Males become darker when mature, and the back of the abdomen is covered with grayish-white powder, and a two-tone dress. It is said that the name is derived from this powder as salt.
The compound eye is dark blue, and it is said to be the model of the lyrics of the nursery rhyme "dragonfly's Glasses" "dragonfly's Glasses are Mizuiro Glasses ...".
Females do not change their body color even when they mature, and are commonly referred to as "Mugiwara dragonflies".
In rare cases, even females seem to be covered with powder and have a shiokara shape, but it is possible to distinguish between male and female due to the difference between the color of the compound eye and the shape of the tail tip.
It is widely adapted and inhabited in ponds, wetlands, paddy fields, ditchs, puddles, artificial water fields, etc.
There are several reasons why dragonflies are relatively healthy in the city center of Tokyo.
First of all, the existence of grass and ground as a feeding ground. In other words, there must be a green space where small insects fly around to a certain extent, such as parks, gardens, riverbed, baseball stadiums and soccer fields.
And there are trees and grasses that rest their wings, and watersides that spawn.
Many dragonflies found in the city center are considered to be a type of spawning ground where relatively shallow and little flow is relatively low.
Shallow puddles, biosap ponds, and school rice fields are also considered to be habitats for spawning and goats, but another one is the pool at the "Heisei no reservoir" school.
Wild creatures are actually quite strong.
Even if the natural environment that originally existed is lost, it seems that they are connecting generations by making good use of the environment similar to that created by humans.
