Plaster Bagworm

Natural Habitat

Typically found indoors in high humidity areas like bathrooms, garages, and closets. They adhere to walls, baseboards, and underneath furniture.

Diet & Feeding

Detritivores that feed on spider webs, old insect skins, wool, human hair, lint, and dead insects.

Behavior Patterns

The larva constructs a seed-shaped, flattened protective case out of silk and debris (sand, dust, fibers) which it carries around. It has openings at both ends to allow the larva to turn around inside. They eventually pupate inside this case.

Risks & Benefits

Generally considered a harmless household pest. They do not bite or sting humans. However, in large numbers, they can be a nuisance and potentially damage wool clothing or fabrics, although they are less destructive than standard clothes moths.

Identified on: 2/18/2026