Household Casebearer or Plaster Bagworm

Natural Habitat

Commonly found indoors on walls, baseboards, and in corners of rooms; heavily associated with closets, woolen fabrics, and areas with spiderwebs. They thrive in humid climates.

Diet & Feeding

Detritivores; they feed on old spider webs, wool, hair, fur, insect remains, dead skin flakes, and natural fibers.

Behavior Patterns

The larva constructs a flattened, pumpkin-seed-shaped protective case out of silk and debris (sand, dust, lint) which it carries around. It has openings at both ends allowing the larva to feed and move from either side. They often climb walls, dragging the case with them.

Risks & Benefits

Generally considered a nuisance pest rather than harmful. They do not bite or sting humans or pets. However, they can damage woolen clothing, rugs, and furs if infestations are large.

Identified on: 3/6/2026