Plaster Bagworm (or Household Casebearer)

Typically found indoors in humid climates; common on walls, baseboards, and in closets, especially in corners or under furniture.

Detritivores; they feed on spider webs, wool, hair, lint, dead insects, and general household dust/debris.

The larva constructs a flat, spindle-shaped or pumpkin-seed-shaped protective case out of silk and debris, dragging it along as it moves. The larva can extend its head from either end of the case to feed or move.

Risks: Generally considered a nuisance pest rather than a danger; can damage woolens or fibers in large numbers. Benefits: They clean up minor debris and old spider webs.