Regal-moth
Guides
Citheronia
Citheronia is a genus of giant silk moths (Saturniidae) established by Jacob Hübner in 1819. The genus comprises approximately 20 species distributed across the Americas, from the United States through Mexico, Central America, and into South America as far as Argentina. The genus is notable for its large, striking caterpillars—such as the famous "hickory horned devil" of C. regalis—which bear prominent horn-like projections and undergo dramatic morphological changes between instars. Adults are characterized by reduced or non-functional mouthparts and short adult lifespans devoted primarily to reproduction.