Frogs are beneficial insects, because most of the insects that frogs prey on are agricultural pests, so they are beneficial animals to human beings. Frogs often inhabit rivers, ponds and rice fields, mainly in the grass near the water, and sometimes they can sneak into the water. Most of them are active at night, mainly eating insects, and also eating some snails, snails, shrimps, small fish and so on. Most of the insects they eat are agricultural pests. It is estimated that a frog can prey on 7 insects a day and kill 15, pests a year. Therefore, frogs are beneficial to agriculture and should be protected. The broad concept of beneficial insects refers to all insects beneficial to human beings, including resource insects. Such as silkworm, the narrow concept refers to natural enemy insects that can prey on pests or parasitize pests, which is relative to pests. We usually understand insects that are beneficial to human production and life as beneficial insects, such as bees, dragonflies and mantises.