These caterpillars march. They fluff. They scare London.

Threats to trees and health aside, oak processionary moth larvae have socially redeeming qualities

Oak processionary caterpillar

BAD HAIR SEASON Oak processionary caterpillars (one shown) show great style in marching formation but then there’s the noxious hair problem. (It’s not the long hairs you need to worry about, but near-invisible short ones.)

Christian Fischer/Wikicommons (CC BY-SA 3.0)

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