Hickory Horned Devil: The Harmless Giant Caterpillar of the Regal Moth

We found a huge green caterpillar near Lake Hartwell and took it to a second-grade "Show and Tell." The kids loved it! Is it dangerous? What kind of moth does it become?

Meet the Hickory Horned Devil

This spectacular caterpillar is the larva of the regal moth (Citheronia regalis), a large orange-brown moth with a five-inch wingspan. Despite its fierce appearance—bright green body, black spines, and curved red "horns"—it's completely harmless.

Life Cycle and Habitat

The caterpillars feed high in hickory, pecan, walnut, and sweetgum trees. They're rarely seen because only strong storms knock them down. In fall, they crawl down to find soft soil for pupation and overwintering.

Fun Autumn Activity

Your students might enjoy attracting other night-flying moths: hang a white sheet in the yard, place a bright light in the center, and watch what flutters in.

See also: Hickory Horned Devil | Regal Moth

Hickory horned devil