Stinging Caterpillars (6556)

Most people know that bees, wasps, hornets and some ants can sting to defend themselves or their nests. Only a few people realize, usually from first hand experience, that handling some caterpillars can produce some painful results. Recognizing the few stinging caterpillar species may prevent irritating encounters.

Caterpillar stages of moths often have spines and barbed hooks. Generally, these are for show and are quite harmless. But there are a few Stinging caterpillars of various shapes, sizes and colors. Stinging caterpillars possess hollow quill-like hairs, connected to poison sacs, that are used as defensive weapons. When these hairs are touched they break through the skin releasing the poison. Reactions can range from a mild itching to the more severe pain, dermatitis, and even intestinal disturbances.

For more information, please visit this University of Kentucky fact sheet.

Printable PDF file

Penn State Entomology Dept.

For more information on this subject, Please visit the College of Agricultural Sciences Publications Web site.

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