Household Casebearer (or Plaster Bagworm)

Typically found indoors in humid climates, often on walls, under furniture, or in closets. They require high humidity to complete their development.

They feed on old spider webs, wool, hair, lint, and dead insects. They are detritivores.

The larva drags a protective, flattened case (resembling a pumpkin seed) around with it, which it constructs from silk and debris. It can retreat inside the case at both ends if threatened. It eventually pupates inside this case.

Generally considered a nuisance pest rather than a major threat. They do not bite or sting humans, but they can damage wool clothing, rugs, and fabrics if present in large numbers.