自 然界有“天敌”之说。狼是鹿的天敌 ,黄鼬是鸡的天敌 ,鹰是蛇的天敌 ,蛇是鼠的天敌。蛇多的地方 ,老鼠肯定就少 ,老屋里有一条蛇 ,老鼠就不敢乱说乱动 ,所以旧俗有把蛇当成是镇宅之宝的。南方近年来 ,鼠患猖獗 ,据说主要原因就是捕蛇太多 ,光是深圳一天就要吃十吨蛇。蛇少了 Nature has “natural enemies,” said. The wolf is the predator of the deer, the weasel is the natural enemy of the chicken, the eagle is the natural enemy of the snake, and the snake is the natural enemy of the mouse. Snake many places, the mouse must be less, there is a snake in the old house, the mouse can not talk nonsense, so the old custom has the snake as a town house treasure. In recent years, the rat rampant in the south, the main reason is said to catch snakes too much, just a day to eat ten tons of snakes in Shenzhen. Snake less