Why does the mother mantis eat her husband mantis?

The purpose of female mantis is to stimulate male mantis to ejaculate and ensure that semen is continuously injected into his body. It turns out that the inhibitory center of the male mantis nervous system is in the head. Once the head is lost, its inhibitory function will also be lost, and the semen will flow into the female mantis to ensure the fertilization of the egg. When mating, the female mantis eats from the head to the tail to the abdomen of the male mantis. At this time, the mother mantis is not only full, but also the eggs in her body are fully fertilized, so that she can lay nutritious eggs.

Other insects

Crickets, grasshoppers, mosquitoes and lions have similar phenomena, but they are not as impatient as the mother mantis, but wait until they mate before eating their spouses.