Yellow Woolly Bear Caterpillar

Natural Habitat

Widely distributed across North America, commonly found in gardens, agricultural fields, meadows, open woodlands, and urban green spaces. They prefer areas with abundant low-growing vegetation.

Diet & Feeding

Polyphagous, feeding on a wide variety of herbaceous plants, garden vegetables, and some tree leaves. Common host plants include sunflowers, beans, corn, dandelions, clover, and various weeds.

Behavior Patterns

The caterpillar stage is primarily concerned with feeding and growing, often molting several times. They are usually solitary but can sometimes be found in groups. When disturbed, they may twitch or drop from their perch. After reaching full size, they will pupate, often in a silken cocoon incorporating their hairs. The adult moths are typically nocturnal and short-lived, with their primary purpose being reproduction.

Risks & Benefits

Potential Risks: The hairs (setae) on the caterpillar can cause skin irritation, itching, or dermatitis in some sensitive individuals if handled, though they are generally not considered dangerously venomous. They can be considered a minor garden pest due to their broad diet, but rarely cause significant damage to established plants. Potential Benefits: As moths, they can act as pollinators to certain flowers. As caterpillars, they are a food source for various birds, parasitic wasps, and flies, contributing to the food web.

Identified on: 8/24/2025