As for the mystery of the crow butterflies 'migratory routes, which was the source of much speculation, in March of 2001 Chan and several others were able to record three routes in Maolin, with over 120,000 butterflies migrating over the course of six days. These findings supported Chen Wen-lung's early conjectures: that every year the butterflies leave along fixed routes.
至於最引人遐思的紫斑蝶遷徙之謎，詹家龍等人在 2001 年 3 月在茂林正式紀錄到 3 條蝶道，6 天內遷移總數量達 12 萬隻，證實了早先當地蝴蝶專家陳文龍的說法──蝶兒們每年都會依循固定路線離開。