Female praying mantis eats male after mating

The praying mantis mating season is the summer time. After mating the female praying mantis will eat the male, and in this video begins with the head.

The reason the male survives even though his head is gone is because his ganglion is in his abdomen. The ganglion is like a brain but more so a cluster of neurones that acts kind of like a brain and it connects certain systems of the body together.