Household Casebearer (Plaster Bagworm)

Natural Habitat

Typically found on interior walls, floors, and under furniture in humid residential environments.

Diet & Feeding

Larvae feed on spider webs and natural fibers such as wool, silk, and human hair.

Behavior Patterns

The larva constructs a protective silk case covered in debris (like dust and sand) which is open at both ends, allowing it to move and feed from either side. They undergo metamorphosis inside this case.

Risks & Benefits

Generally harmless to humans. They are considered minor household pests because they can damage silk or wool clothing, and their cases are often mistaken for debris or cobwebs.

Identified on: 4/15/2026