Household Casebearer (Plaster Bagworm)

Natural Habitat

Typically found inside buildings, especially on walls or in corners, in humid climates.

Diet & Feeding

Larvae feed on spider webs, wool, hair, and dropped natural fibers or detritus.

Behavior Patterns

The larva lives inside a silk-lined, flattened, spindle-shaped case covered in sand or dust. It can poke its head out from either end to move or feed.

Risks & Benefits

No health risk to humans. They are considered minor household pests as they can occasionally damage rugs or wool items, but they primarily help clean up organic debris.

Identified on: 4/15/2026