Household Casebearer or Plaster Bagworm

Natural Habitat

Typically found indoors in warm, humid climates; they thrive in closets, corners of rooms, underneath furniture, and in garages. Outdoors, they may be found on exterior walls or in protected crevices.

Diet & Feeding

Detritivores; they feed on old spider webs, wool, hair, lint, dead insects, shed insect skins, and natural fibers.

Behavior Patterns

The larva builds a flattened, pumpkin-seed-shaped case made of silk and camouflaged with sand, soil, and debris. It drags this case around as it moves. The larva eventually pupates inside the case before emerging as a moth.

Risks & Benefits

Generally considered a nuisance pest rather than a major threat. They do not bite or sting humans. However, large infestations can damage wool clothing, rugs, or fabrics.

Identified on: 3/1/2026