The white caterpillars with long black hairs are most commonly Hickory Tussock Moth Caterpillars (Lophocampa caryae). These distinctive larvae are often seen as they prepare for pupation.
Identifying Hickory Tussock Moth Caterpillars
Hickory tussock moth caterpillars are easily recognized by their unique appearance:
- Coloration: They are predominantly fuzzy white with striking black tufts and long, thin black hairs. This striking contrast makes them stand out.
- Fuzzy Appearance: Their bodies are covered in dense hairs, giving them a very soft, fuzzy look.
- Seasonal Presence: These caterpillars are frequently encountered in the fall, often as they wander in search of a place to pupate.
Defensive Mechanism and Skin Irritation
A key characteristic of Hickory Tussock Moth Caterpillars is their defense mechanism involving their hairs:
- Defense Hairs: The long black hairs and tufts on their bodies are not just for show; they serve as a protective measure against predators.
- Irritation: While generally not dangerous, direct contact with these hairs can cause skin irritation for sensitive individuals. Symptoms might include a rash, itching, or redness, similar to a mild allergic reaction. It's best to observe them without touching.
Key Characteristics at a Glance
| Feature | Description |
|---|---|
| Common Name | Hickory Tussock Moth Caterpillar |
| Scientific Name | Lophocampa caryae |
| Appearance | Fuzzy, predominantly white body with distinct black tufts or spots along the back and long, fine black hairs. |
| Hairs | Used for defense; may cause skin irritation in sensitive individuals. |
| Typical Season | Commonly seen in the fall (late summer to early autumn) as they prepare for winter pupation. |
| Habitat | Found on a variety of deciduous trees, including hickory, oak, walnut, ash, elm, and willow, which they feed on. |
Where to Find Them
These caterpillars are typically found on the leaves of their host trees. As they mature, especially in the fall, they may be seen crawling on sidewalks, driveways, or even the sides of houses as they look for suitable overwintering sites.
For more detailed information, you can consult resources like the Penn State Extension.
