Household Casebearer (often called Plaster Bagworm)

Natural Habitat

Commonly found indoors on walls, in corners, on carpets, clothing, and under furniture; prevalent in humid, warm climates.

Diet & Feeding

Detritivore; feeds on old spider webs, book bindings, wool, hair, lint, dead insects, and fibers.

Behavior Patterns

The larva constructs a distinctive flattened, pumpkin-seed-shaped case made of silk and camouflaged with sand, dust, and debris. It stays inside this mobile home, dragging it along as it feeds. Before pupation, it typically attaches itself to a vertical surface like a wall.

Risks & Benefits

Generally considered a nuisance pest rather than dangerous. They do not bite or sting humans. However, they can cause minor damage to fabrics, woolens, and rugs if infestations are heavy.

Identified on: 3/8/2026