Tussock Moth Pupa/Cocoon

Found on tree trunks, branches, fences, and the sides of buildings in hardwood forests and suburban areas.

In the pupal stage, it does not eat. As larvae (caterpillars), they consume the leaves of various deciduous trees including oak, willow, and maple.

The larva spins a protective silk cocoon often incorporating its own urticating hairs for defense. It remains in this dormant stage for several weeks before emerging as an adult moth.

Risk: The hairs embedded in the cocoon can cause severe skin irritation, rashes, or allergic reactions in humans (urticaria) if handled. Benefit: They serve as a food source for birds and parasitic wasps within the ecosystem.