婉转,清丽,高(gāo )(🐽)亢(🥇),鸟(niǎo )儿(🏽)在枝头欢(🌰)唱。世(shì )界自然(rán )纪录片之父爱(ài )登堡老爵爷讲述(🛤)鸟类(lèi )鸣叫对于种群(qún )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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