Bug Identifier
Isabella Tiger Moth (Caterpillar state: Woolly Bear)
Community identification

Isabella Tiger Moth (Caterpillar state: Woolly Bear)

Pyrrharctia isabella

Order & Family
Lepidoptera: Erebidae
Size
Up to 2 inches (5 cm) in length
See this bug in the Encyclopedia

Natural Habitat

Fields, gardens, and woodlands throughout North America

Diet & Feeding

Generalist herbivore; feeds on low-growing plants like dandelions, plantains, clovers, and grasses

Behavior Patterns

Known for crossing roads in autumn while searching for overwintering sites under leaf litter or logs. They can survive freezing temperatures by producing a cryoprotectant.

Risks & Benefits

Harmless to humans, though their stiff hairs may cause minor skin irritation in sensitive individuals. Beneficial as part of the food web and folklore subjects for 'predicting' winter.