Plaster Bagworm (or Household Casebearer)

Natural Habitat

Often found indoors on walls, especially in corners, under furniture, or in closets. They thrive in humid environments like garages and bathrooms.

Diet & Feeding

Detritivores feeding on dust, spider webs, wool, hair, lint, and dried insect parts.

Behavior Patterns

The larva constructs a distinctive flattened, pumpkin-seed-shaped case made of silk and covered with sand, dust, and debris for camouflage. It drags this protective case around with it as it moves.

Risks & Benefits

Generally considered a harmless nuisance pest. They do not bite or sting humans, though they can occasionally damage wool fabrics or fur if indisturbed for long periods. They help clean up minor debris but are unsightly.

Identified on: 2/28/2026