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雲林林內紫斑蝶二次遷徙
May 25th 2013, 06:52

連日豪雨過後，這兩天氣候放晴，雲林縣林內鄉國道附近又爆出大量遷徙的紫斑蝶，林內鄉成功國小曾振楠老師說，24日上午10時紫斑蝶每分鐘超過330隻，25日上午10時每分鐘約300隻，這些紫斑蝶是二次遷徙的蝴蝶，通常都是零星遷徙，可能原本在日前梅雨時就要羽化成蝶，卻受限天候影響，雨後才同時羽化，所以這兩天氣候晴朗才爆出大量遷徙，台灣生態學會雲林工作站長陳清圳估計同時間約有3萬隻紫斑蝶通過雲林。

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