Puss Caterpillar (Megalopyge opercularis pupa/cocoon)
Scientific Name: Megalopyge opercularis
Order & Family: Lepidoptera, Megalopygidae
Size: 1 inch to 1.5 inches (2.5 to 4 cm) for the cocoon/caterpillar stage.
Natural Habitat
Deciduous forests, orchards, and gardens, commonly found on oak, elm, and citrus trees across the southeastern United States and Mexico.
Diet & Feeding
The larval stage feeds on the leaves of various trees and shrubs including oak, elm, sycamore, and citrus; the pupal stage does not feed.
Behavior Patterns
The caterpillar spins a tough, oval, silken cocoon often incorporating its own stinging hairs for protection during pupation. It can remain in this dormant stage for weeks or even months depending on the season.
Risks & Benefits
The cocoon contains extremely venomous, hollow stinging hairs that deliver a painful sting causing rash, swelling, and severe pain if touched. They provide minor ecosystem benefits as occasional prey for specific birds and insects.
Identified on: 5/18/2026