Household Casebearer (often confused with Plaster Bagworm)

Natural Habitat

Typically found indoors in humid climates, often seen on walls, in corners near the floor, or under furniture. They construct silken cases covered in debris to hide in.

Diet & Feeding

Feeds on old spider webs, wool, hair, lint, and other keratin-containing materials or detritus found in homes.

Behavior Patterns

The larva carries a flat, pumpkin-seed-shaped case around with it for protection. It can extend its head from either end to move. Before pupating, they attach their case to a wall or sheltered surface.

Risks & Benefits

Generally considered a minor pest. They do not bite or sting humans. While they can feed on wool fibers, they rarely cause significant damage to fabrics compared to clothes moths. They are mostly nuisance pests due to the unsightly cases on walls.

Identified on: 2/18/2026