“树上三窝鸟，害虫活不了”。这句林谚科学地总结了鸟类在治虫、保护森林方面的重要作用。早在２０００多年以前，我国著名的思想家庄周，经过仔细观察蝉——螳螂——黄雀相互之间的关系以后，提出“螳螂捕蝉，黄雀在后”的哲理，揭示了生物之间存在着一条复杂的生物链。... “Three birds nest tree, pests can not live.” Lin proverbs scientifically summed up the birds in the pest control, the important role of forest protection. As early as 2000 years ago, the well-known thinker Zhuang Zhou, after careful observation of the relationship between the cicadas - praying mantis - yellow bird, put forward the philosophy of "mantis cicada, There is a complex biological chain. ...