Plaster Bagworm (or Household Casebearer)

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

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

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.

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.