Household Casebearer (also known as the Plaster Bagworm)

Typically found indoors in humid climates, often seen on walls, baseboards, underneath furniture, or in closets. They create a protective case out of silk and debris (sand, soil, lint).

Feeds on keratin-containing materials such as spider webs, wool, hair, and sometimes dried insects. They are detritivores.

The larva lives inside a flattened, pumpkin-seed-shaped case which it drags around while feeding. It can emerge from either end of the case. They eventually pupate inside this case before emerging as small moths.

Generally harmless to humans (they do not bite or sting). They are considered a minor household pest because they can feed on woolen fabrics or rugs, but they primarily feed on spider webs and old insect debris.