Because it has the word "snake", many people are afraid of being poisoned by it. In fact, a four-legged snake is neither a snake nor a bite. Lizards and skinks mainly eat insects, and most of these insects are pests, so they are good friends of human beings. The tail of a quadruped snake will fall off immediately after being caught, but it can still live normally, and will gradually grow a new tail in the future. This physiological phenomenon is called "regeneration".