Royal Walnut Moth

What is this?
Came home from vacation and found this huge moth? laying eggs on my apartment wall. It is at least 5 inches long. Any idea what it may be? I am from Columbia MD.

Hi Jeremy,
Wonderful photos of a Royal Walnut Moth, Citheronia regalis, also known as the Regal Moth. The incredible looking caterpillars are known as Hickory Horned Devils and Hickory and Walnut are two major food plants eaten by the caterpillar. Adults do not eat.

Leave a Comment