
Community identification
Isabella Tiger Moth (Caterpillar state: Woolly Bear)
Pyrrharctia isabella
- Order & Family
- Lepidoptera: Erebidae
- Size
- Up to 2 inches (5 cm) in length
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.