Household Casebearer (Plaster Bagworm)

Natural Habitat

Indoor environments, particularly on walls in humid, tropical and subtropical climates.

Diet & Feeding

Larvae feed on spider webs, wool, hair, and organic debris found in household dust.

Behavior Patterns

The larva constructs a protective silk case covered in sand, dust, and debris. It is open at both ends, allowing the larva to feed from either side and move on vertical surfaces.

Risks & Benefits

Generally considered a minor household pest. While they can damage fabrics like silk or wool, they primarily scavenge organic debris and pose no direct health risk to humans.

Identified on: 4/1/2026