Plaster Bagworm
Scientific Name: Phereoeca uterella
Order & Family: Lepidoptera: Tineidae
Size: Case length is typically 10 to 15 mm
Natural Habitat
Humid environments, often found inside homes on walls, floors, or in closets
Diet & Feeding
Larvae feed on spider webs, wool, human hair, and silk fabrics
Behavior Patterns
The larva constructs a protective flattened, pumpkin-seed-shaped case from silk and environmental debris, which it drags along as it moves.
Risks & Benefits
Mostly a nuisance pest, though they can occasionally damage natural fabrics like wool or silk rugs and garments.
Identified on: 1/3/2026