燕子低飞 天将雨
收录日期：2025-08-07 10:57:43 热度：11℃
燕子以昆虫为食，在天气将下雨的时候，空气里的水汽多，一些小虫子飞不高，只能在近地面处飞来飞去。近地面的小虫活动频繁，燕子便低飞捕食。又由于下雨前的气流较乱，燕子在低飞时便忽高忽低，翻飞不定。所以“燕子低飞”，是“天将雨”的预兆。以外民间还流传着“蜻蜓成群低飞绕天空，不过三日雨蒙蒙”的谚语，也是这个道理。
燕子以昆虫为食，在天气将下雨的时候，空气里的水汽多，一些小虫子飞不高，只能在近地面处飞来飞去。近地面的小虫活动频繁，燕子便低飞捕食。又由于下雨前的气流较乱，燕子在低飞时便忽高忽低，翻飞不定。所以“燕子低飞”，是“天将雨”的预兆。以外民间还流传着“蜻蜓成群低飞绕天空，不过三日雨蒙蒙”的谚语，也是这个道理。
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