Woodpecker, a doctor of forest, is a common resident bird. There are green woodpecker and spotted woodpecker widely distributed in China. They specialize in foraging for pests such as longicorn beetles, brown beetles, moths and stupid insects, and can eat about 1500 every day. Because woodpeckers eat a lot and have a wide range of activities, in the forest of 13.3 hectares, if a pair of woodpeckers inhabit, they can peck more than 90% of Gibberella and 80% of Anoplophora glabripennis in a winter, so people call woodpeckers "forest doctors" and are friends of mankind! Absolutely beneficial birds.