婉转，清丽，高亢，鸟儿在枝头欢唱。世界自然纪录片之父爱登堡老爵爷讲述鸟类鸣叫对于种群的意义。
David Attenborough chooses seven of the most remar
婉转，清丽，高亢，鸟儿在枝头欢唱。世界自然纪录片之父爱登堡老爵爷讲述鸟类鸣叫对于种群的意义。
David Attenborough chooses seven of the most remarkable animal songs found in nature and explores the significance of these songs in the lives of their species.
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