In 2006, after six years, 90 sightings of butterflies migrating in spring, and 27 instances of recapturing marked butterflies, Chan Chai-lung was finally able to string together the butterflies 'spring migration routes.
2006 年，累積了 6 年春季遷移期間的「蝶道」觀察紀錄 90 筆，和「再捕獲」紀錄 27 筆，詹家龍終於串起了紫蝶的遷移路線。