Household Casebearer (Plaster Bagworm)

Natural Habitat

Indoor environments, particularly on walls, floors, and under furniture where dust and pet hair accumulate.

Diet & Feeding

Larvae feed on spider webs, wool, human hair, dust, and discarded insect carcasses.

Behavior Patterns

The larva builds a flattened, spindle-shaped silken case covered in sand or dust grains. It can move by poking its head out from either end of the case to crawl.

Risks & Benefits

They are nuisance pests that can damage natural fibers like silk and wool, but they are generally harmless to humans and pets.

Identified on: 4/1/2026