Unveiling the Mysteries of Taiwan's Crow Butterflies Like migratory birds, Taiwan's crow butterflies arrive in large groups every winter, gathering in some 30 "purple butterfly valleys" of Kaohsiung, Pingtung, and Taitung. With numbers approaching a million, this ecological marvel has been compared with the winter swarming of monarch butterflies in Mexico. The two are believed to be the world's largest congregations of overwintering butterflies.
如同候鳥一般，台灣的紫斑蝶每年冬天會一批批來到溫暖的南台灣山谷聚集，在高雄、屏東、台東形成三十多個「紫蝶幽谷」；總計近百萬隻斑蝶聚集的生態奇觀，被蝴蝶專家認為可與墨西哥的「帝王斑蝶谷」媲美，並列為世界兩大「越冬型蝴蝶谷」。