Household Casebearer (or Plaster Bagworm)

Typically found indoors in dry, dusty areas of homes, particularly on walls, floor molding (baseboards), carpets, and underneath furniture. They prefer humid climates.

The larvae feed on keratin-rich debris including spider webs, old insect skins, wool fibers, hair, and sometimes dried plant material.

The larva constructs a distinctive flat, pumpkin-seed-shaped protective case out of silk and debris (sand, dust, fibers) which it carries around. It can retract fully inside when threatened. They eventually pupate inside this case.

Risks: Generally harmless to humans and pets (they don't bite or sting). However, in large numbers, they can be minor pests that damage wool clothing, rugs, or fabrics. Benefits: They act as cleaners by eating spider webs and dead insects.