Household Casebearer (Plaster Bagworm)

Natural Habitat

Typically found indoors in humid climates, often on walls, in closets, corners of rooms, or underneath furniture. They prefer dark, undisturbed areas.

Diet & Feeding

The larvae feed on keratin-rich materials like wool, hair, and spider webs, as well as dead insects and plant debris.

Behavior Patterns

The larva constructs a flattened, pumpkin-seed-shaped case made of silk and debris (sand, dust, lint) which it carries around for protection. It moves by dragging this case along surfaces. When threatened, the larva pulls back completely inside.

Risks & Benefits

Generally considered a household pest. They do not bite or sting humans, but they can damage fabrics, rugs, and woolen clothing. They can be a nuisance due to their presence on walls and floors.

Identified on: 3/5/2026