
If you live in Yunlin, you’re probably used to the freeway lane closures that happen every year due to the migration of thousands upon thousands of purple crow butterflies. This spectacular natural phenomenon and the ensuing traffic restrictions usually take place in March or April, around the Tomb-Sweeping Festival. But this year, for the first time in decades, the butterflies have gone on their northward migration in July. A huge swarm formed in the area on Wednesday, with as many as 608 butterflies crossing National Freeway No. 3 in one minute.
A dense swarm descended on the freeway. It was far bigger than the spring migration, which only recorded a peak count of 100 butterflies per minute. Amid the unexpected surge, the Freeway Bureau rushed to close the outer northbound lane in Linnei, between the 252.5K and the 251K markers, to prevent vehicles from striking the butterflies. Conservationists say a big butterfly surge was also recorded in September 2009, following Typhoon Morakot. But they say it’s the first time in 20 years that such a massive migration takes place in July.
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#butterfly #insect #iloveinsects #nature #amazing #humansbeingbros
國道3號雲林林內段,是紫斑蝶北返的重要廊道,高公局每年為此封路讓為"蝶道",過往紫斑蝶每年清明前北返遷徙,15日卻罕見在七月盛夏出現大批紫斑蝶飛越國道,最高每分鐘多達608隻。
一隻一隻、密密麻麻的,飛舞過國道上空的是紫斑蝶,今年3、4月紫斑蝶北返季數量偏少,最高每分鐘只100多隻,喊在7月盛夏爆大量,國道高公局緊急封閉雲林北上252.5K至251K林內段外側車道,避免紫斑蝶遭車輛撞擊。保育協會方面指出,2009年八八風災時,9月也曾爆量,但在7月盛夏爆量是20年首見。]
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