Question: is the hickory horned devil poisonous?
Answer: Meet the Hickory Horned Devil, a Fierce but Harmless Caterpillar. Hickory horned devil caterpillars look fierce and can be almost as big as a hot dog, but they're harmless. ... They're so big and fierce-looking that even chickens — which usually love to eat caterpillars — have been known to stay away from them.