Household Casebearer (often confused with Plaster Bagworm)

Natural Habitat

Found in homes, especially in humid climates, garages, and underneath furniture where dust and fibers accumulate. They are often seen attached to walls or crawling on carpets.

Diet & Feeding

Larvae feed on old spider webs, wool, hair, lint, and other keratins or natural fibers found in household dust.

Behavior Patterns

The larva constructs a flattened, pumpkin-seed-shaped protective case out of silk and debris (sand, dust, fibers) which it drags around. It can retreat inside the case at both ends to turn around.

Risks & Benefits

Generally considered a minor household, nuisance pest rather than a major threat. While they can feed on wool clothes, they usually prefer spider webs and general dust debris. They do not bite or sting humans.

Identified on: 3/2/2026