Hickory Horned Devil Caterpillar: The Pre-Horn Stage

That 6-Inch Caterpillar Before It Grows Its Horns

The hickory horned devil (Citheronia regalis) larva is one of North America's most spectacular caterpillars. The photo shows the pre-final instar—large, green, with black spines but before the characteristic orange/black "horns" develop.

Life Cycle Highlights

• Feeds on hickory, walnut, pecan, persimmon, sweetgum, sumac
• Stays high in canopy—rarely seen until final descent
• Drops to ground in late summer to pupate in soil
• Adult: regal moth, 5–6" wingspan, gray/orange
• One generation per year

No Control Needed

These are solitary, native insects. Their brief appearance is a privilege—observe and enjoy. They do not damage tree health.

Mature form