The caterpillar will, however, eat a little of your herbs. Nothing much to really call it a pest, but it should be noted to rehome them if you find them hanging around your herb plants.
The caterpillar is generally found during the autumn months and doesn’t sting or bite when picked up. However, the little bristle hairs can get under your skin and cause irritation.
Some people once thought that the thickness of different bands of the bristle hair would tell how hard or cold the winter was going to be. Turns out, that is an old wives’ tale.