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疑因天雨延後羽化　紫斑蝶今群飛
May 25th 2013, 07:41

被林內人稱清明蝶的紫斑蝶，這幾天大量北返，民眾昨天中午在著名的觸口觀測點拍群蝶飛舞畫面，po上網後引起驚嘆。記者今上午實地前往查看，果真有許多紫斑蝶，盛況勝過今年清明時節。

長期觀察紫斑蝶的成功國小老師曾振楠說，紫斑蝶生命週期約4、5個月，北遷以清明時節最集中，被稱為一次蝶、二次蝶在6月前後，很零散。最近一個星期都在下雨，他推測可能因此延緩羽化時間，拖到這2天一起羽化，才會大爆發。

清明時節成群出現的紫斑蝶，昨天大量飛越國道三號清水橋段。 顏幸如攝

清明時節成群出現的紫斑蝶，昨天大量飛越國道三號清水橋段。 顏幸如攝

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