American Dagger Moth Caterpillar

Natural Habitat

Found in deciduous forests, woodlands, suburban areas, parks, and gardens where host trees are present.

Diet & Feeding

The caterpillars are polyphagous, feeding on the leaves of a wide variety of deciduous trees and shrubs including oak, maple, birch, elm, willow, and ash.

Behavior Patterns

The caterpillar is solitary and feeds on various host plants. As it nears pupation, it typically seeks a sheltered place to spin a cocoon, often incorporating its own hairs. Adults (moths) are nocturnal.

Risks & Benefits

Potential Risks: The hairs of the American Dagger Moth caterpillar can cause skin irritation (dermatitis) in some individuals, leading to itching, redness, and a rash, especially upon direct contact. While generally not severe, sensitive individuals should avoid handling them. Potential Benefits: As herbivores, they play a role in nutrient cycling in their ecosystems. They also serve as a food source for various predators, including birds and parasitic insects, contributing to the food web.

Identified on: 8/19/2025