Household Casebearer (often confused with Plaster Bagworm or Clothes Moth larvae)

Natural Habitat

Found indoors in homes, particularly in high humidity areas like bathrooms, closets, underneath furniture, and in garages. They are often spotted on walls or carpets.

Diet & Feeding

Detritivores feeding on old spider webs, wool, hair, dead insects, and general house dust. They do not typically eat plaster despite the nickname 'Plaster Bagworm' (which refers to a similar-looking species).

Behavior Patterns

The larva constructs a flat, pumpkin-seed-shaped silk case around itself, camouflaging it with debris like sand, dust, and soil. It drags this case along as it moves. Before pupating, they often climb vertical surfaces like walls.

Risks & Benefits

Generally considered a nuisance pest rather than a major threat. They can damage wool, silk, or fur fabrics if populations are high, but they are primarily scavengers of dust and spider webs. They do not bite or sting humans.

Identified on: 2/15/2026