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燕子怎样捉虫
更新时间: 2021-06-15 08:10:26  

1、燕子捕捉的食物主要是蚊子和苍蝇等昆虫,在其飞行时,会发出“咝咝”声。寻找食物的时候,一边飞行,一边张着嘴巴把飞虫吃进嘴里。

2、燕子是人类的益鸟,一只燕子一个夏季可捕食各种害虫50万只以上,保护了农作物。燕子是我国著名的夏候鸟,每年初春迁徙来到北方,夏季遍布全国,繁殖后结群南。

3、燕子最愿意接近人类,人类最爱护这种益鸟。在4~7月从海岛回归靠近农田(昆虫)的农家繁殖。燕在农家屋檐下营巢,巢多是用衔来的泥和草茎用唾液粘结而成,内铺以细软杂草、羽毛、破布等,还有一些青蒿叶。

关键词: 燕子 怎样

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