google了一下，这种现象叫 Pine processionary：
Lengthy processions are formed when fully grown caterpillars abandon their host tree in search of pupation sites, when as many as three hundred caterpillars may travel long distances from the natal tree looking for soft soil in which to bury themselves and form cocoons. During processions, stimuli from setae on the tip of the abdomen of the caterpillar in front serve to hold processions together, taking priority over the trail pheromone or silk.
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FROM 193.92.44.52

作死干嘛要点进来，鸡皮疙瘩中。。。

【 在 zerodot2021 的大作中提到: 】
: 今天早上去上班，在路上见到毛毛虫连成一条线，得有上百条，差点踩上去。看的我起鸡皮疙瘩。
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FROM 58.22.123.*

haha, 就一自然现象而已。
今早上发现这些毛毛虫还在，分成两条线了。想着要不要拿火来烧了它们。。。。也算是为pine trees除害。

【 在 jjjc 的大作中提到: 】
: 作死干嘛要点进来，鸡皮疙瘩中。。。
:
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FROM 195.167.31.50

头对尾尾对头的，还挺整齐

【 在 zerodot2021 的大作中提到: 】
: 今天早上去上班，在路上见到毛毛虫连成一条线，得有上百条，差点踩上去。看的我起鸡皮疙瘩。
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FROM 223.71.21.*

看不懂， 这现象还挺有意思的， 能简介下吗？

【 在 zerodot2021 的大作中提到: 】
: google了一下，这种现象叫 Pine processionary：
: Lengthy processions are formed when fully grown caterpillars abandon their host tree in search of pupation sites, when as many as three hundred caterpillars may travel long distances from the natal tree looking for soft soil in which to bury themselves and form cocoons. During processions, stimuli from setae on the tip of the abdomen of the caterpillar in front serve to hold processions together, taking priority over the trail pheromone or silk.
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FROM 111.196.31.*