When these hairs are touched they pierce the skin releasing poison. Stinging caterpillars possess hollow quill-like hairs, connected to poison sacs, which are used as defensive weapons. There are other less common stinging caterpillars and others common ones which may cause less severe reactions which are not listed here. This factsheet describes some of the more commonly encountered stinging caterpillars in Kentucky which cause serious reactions. We are fortunate that only the caterpillar stage of these species sting, the adults do not have stinging hairs. But we have several few stinging caterpillars of various shapes, sizes and colors. With most species, these are for show and are quite harmless.
Recognizing the few stinging caterpillar species in Kentucky may prevent irritating encounters.Ĭaterpillars are immature stages of moths and butterflies that often have spines and barbed hooks. Only a few people realize, usually from first- hand experience, that handling some caterpillars can produce some painful results. Most people know that bees, wasps, hornets and some ants can sting to defend themselves or their nests. University of Kentucky College of Agriculture
ENTFACT-003: Stinging Caterpillars | Download PDF | En Español by Ric Bessin, Extension Entomologist
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