观鸟小百科：鸟儿鸣叫的功能和含义

我们知道鸟儿都会叫，但鸣叫却为雄鸟所独有。鸟儿鸣叫的主要原因有两个，一是为了爱情，二是为了战争。为了爱情是指用声音吸引异性，为了战争是指用声音宣示领地。

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观鸟小百科：鸟儿鸣叫的功能和含义

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