rocessionary caterpillars latin name thaumetopoea pityocampa thaumetopoeidae crawling in the colony on a road asphalt

allergy asphalt black butterfly caterpilar caterpillar centipede centopiedi colony crawling crawly creepy dangerous hairs hairy harmful infection infestation infested insect irritant irritating larva lava line nature notifiable orange over parasite pest pine pityocampa plague poison poisonous procession processionary pupa pupate road row running shoe slither spring springtime step thaumetopoea thaumetopoeidae train wild wildlife