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为什么现在下雨天也少有蜻蜓了？因为人类欺骗了它们的感情
source link: https://tech.sina.com.cn/d/a/2020-07-22/doc-iivhvpwx6792698.shtml
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来源： 中科院物理所大家可能注意到了，小时候（我说的是我小时候也是你小时候）下雨前后会有很多蜻蜓，但是现在城市里蜻蜓比较少见，哪怕是下雨也带不出几只。蜻蜓作为环境指示生物，在全世界的数量都在下降。栖息地的减少和污染固然是导致蜻蜓数
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