A few adults, which are the parents of populations of the year, come to central Japan in late April every year from the south probably crossing over the ocean, and then oviposit in paddy fields which are irrigated. Therefore, P. flavescens is also adapted to Japanese paddy fields. It is not difficult to imagine that a huge number of odonates emerged from paddy fields every year of those times. We Japanese had lived with odonates, which had been the most familiar insect of Japan. However, unfortunately, odonates around us have been reduced in number for the last 30 - 40 years probably due to modernized agriculture which uses various chemicals.
Odonates are no longer familiar for Japanese children of the present age.
I think it is one of pressing problems for Japanese odonatologists and naturalists being interested in odonates to conserve those familiar insects around us and in the country, Japan. Rice field and dragonflies. Arai, Y., 1996. Adaptation of red-dragonflies in Japnese paddy fields. Dragonflies of Kinki District, Central Japan.