In the once blue sky, in June and July every summer Saw dragonflies flying in the sky. But now there is almost no dragonfly in sight. In addition to environmental damage, there is actually another main reason.
In addition, it is man-made. With the development of society, people are increasingly demanding food, and even choose to eat some strange animals. Animals beneficial to humans are placed on the table in the name of high protein content, such as frogs, silkworm pupae, and dragonflies.
Dragonfly is a beneficial insect to humans. Both adults and larvae are predatory, and all kinds of small flying insects are delicious delicacies for dragonflies, mosquitoes, flies, leafhoppers, small moths, butterflies, horsefly and other comers are not rejected.
A horse with a large head and a dragon can eat close in one day 1000 small flying insects. A dragonfly can eat 40 flies or 840 mosquitoes in one hour, and a dragonfly larva can eat more than 3000 mosquito larvae a year.
The larvae of dragonflies are usually called "water scorpions". The purpose of classifying "water scorpions" is to bring them to the table and make them a delicacy. We all know that it takes a year from a larva to a dragonfly. After becoming a dragonfly, their life span is very short. Now in summer, mosquitoes and flies without natural enemies will become more and more "rampant." The editor appeals: protecting animals starts with you and me!