Bug Identifier
Woolly Bear Caterpillar
Community identification

Woolly Bear Caterpillar

Pyrrharctia isabella

Order & Family
Lepidoptera, Erebidae
Size
Typically grows between 10 mm and 50 mm in length.
See this bug in the Encyclopedia

Natural Habitat

Found in temperate regions across North America, inhabiting fields, meadows, and gardens under logs or leaf litter.

Diet & Feeding

Polyphagous herbivores feeding on low-growing herbaceous plants including dandelion, clover, and various grasses.

Behavior Patterns

Rolls into a tight defensive ball when threatened. Overwinters as a caterpillar under debris, freezing solid before resuming activity in spring.

Risks & Benefits

Harmless to handle, though bristles may cause mild skin irritation in sensitive individuals. Serves as an important food source for birds and small mammals.