
Community identification
Woolly bear caterpillar (likely Isabella tiger moth larva)
Pyrrharctia isabella
- Order & Family
- Lepidoptera; Erebidae (formerly placed in Arctiidae)
- Size
- About 3–5 cm (1.2–2 in) long when mature.
Natural Habitat
Fields, gardens, roadsides, and other open areas across North America; often found wandering in fall.
Diet & Feeding
Feeds on many low-growing plants, including grasses, dandelions, and plantain.
Behavior Patterns
A fuzzy, banded caterpillar that curls up when disturbed and overwinters as a larva; it later pupates into an Isabella tiger moth.
Risks & Benefits
Generally harmless, though its bristles may irritate sensitive skin. It is part of the food web and does not typically cause serious plant damage.