Plaster Bagworm (or Household Casebearer)

Natural Habitat

Typically found indoors in high-humidity areas, often seen clinging to walls, floorboards, or furniture. Common in tropical and subtropical climates.

Diet & Feeding

Detritivores. They feed on varied organic matter including spider webs (and the dry insect remains within), wool, hair, lint, and old insect skins.

Behavior Patterns

The larva constructs a protective, flattened, pumpkin-seed-shaped case out of silk and debris (like sand, soil, and lint), dragging it along as it moves. The larva can extend its head from either end of the case to feed or move.

Risks & Benefits

Generally harmless to humans (they do not bite or sting). Considered a minor household pest because their presence can be unsightly, but they rarely cause significant damage unless present in large numbers.

Identified on: 3/1/2026