Plaster Bagworm (or Household Casebearer)

Natural Habitat

Typically found indoors in high humidity locations like closets, garages, and underneath furniture edges, often attached to walls and baseboards.

Diet & Feeding

Feeds on wool, flannel, hair, skin flakes, spider webs, and insect remains.

Behavior Patterns

The larva wanders around carrying a flattened, pumpkin-seed-shaped case made of silk and debris (like sand, hair, and frass). The moth eventually pupates inside this case.

Risks & Benefits

Generally harmless to humans but can be a minor pest of fabrics, occasionally damaging woolen clothing or rugs. They are often considered a nuisance pest rather than a major threat.

Identified on: 2/22/2026