鸟类大都是以害虫为食,被人们誉为“树木医生”。自1977年起,山东省日照县林业科技人员,一直在对灰喜鹊进行人工饲养驯化。养鸟员把刚刚长出毛羽、体重50克左右的雏鸟取来饲养,喂食时以哨音为令,训练雏鸟的“纪律性”。会飞时将它们放入设在林中的大网笼里,鸟儿在笼内可以自由飞翔、洗澡和取食。并以哨音和食料引诱,带领它们上山训练飞翔和捕食能力。在人工饲养驯化的基础上,1981年5 Birds are mostly pests for food, was hailed as “tree doctor.” Since 1977, forestry scientists and technicians at Rizhao County, Shandong Province, have been domestication of the gray magpie. The bird-bearers kept the newly-grown chickens with a hairiness of about 50 grams and fed the whistling sound to train the “discipline” of the chicks. When they fly, they are placed in a large cage in a forest where birds fly freely, bathe and feed. Lure them with whistles and foodstuffs, and lead them up the mountain to train in fly and predator ability. On the basis of artificial rearing and domestication, 1981 5