Plaster bagworm (or Household casebearer)

Commonly found inside homes on walls, under furniture, or in closets, as well as on walls in warm, humid climates.

Larvae feed on spider webs, lint, wool, human hair, and silk fibers.

The larva constructs a protective silk case covered in sand or dust and can extend its head from either end. It drags the case while moving and eventually attaches it to a surface to pupate.

They are considered a minor household pest because they can damage silks and wool fabrics. They are harmless to humans and do not bite or sting.