Household Casebearer (Plaster Bagworm)

Natural Habitat

Typically found indoors in humid climates, often on walls, under furniture, or in corners where dust and debris accumulate.

Diet & Feeding

Feeds on wool, hair, spider silk, old spider webs, and dried insect remains.

Behavior Patterns

The larva constructs a protective case out of silk, sand, and debris which it drags around while feeding. The case is shaped like a pumpkin seed or a flat spindle, with openings at both ends to allow the larva to turn around inside.

Risks & Benefits

They do not bite or sting humans. They are considered a minor household pest because they can damage woolen fabrics and rugs, though they primarily feed on cobwebs and debris.

Identified on: 3/5/2026