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动物在交流时经常会对彼此发出警报信号,用来信号警示周围的同类附近存在的威胁。这是一种反捕食者适应,广泛存在于社会性动物中。许多灵长类鸟类有复杂的警告声音。昆虫则会采用声音以外的方式,比如释放化学物质英语Schreckstoff

知更鸟会发出咔哒声来警告同类

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Department of Systematics and Ecology, University of Kansas

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