Household Casebearer (often specifically the Plaster Bagworm or Case-bearing Clothes Moth larva)

Typically found indoors in high humidity environments, residing on walls, baseboards, carpets, and in closets or storage areas where fibers are available.

Feeds on natural fibers like wool, silk, and hair, as well as spider webs, lint, and dried insect remains.

The larva constructs a distinctive flattened, pumpkin-seed-shaped protective case out of silk and debris (sand, soil, droppings, fibers) which it carries around while feeding. It eventually pupates inside this case.

Generally harmless to humans (does not bite or sting), but considered a household pest as they can damage fabrics, clothing, and rugs made of natural fibers. They do not cause structural damage.