Plaster Bagworm (Case-bearing Moth Larva)
Scientific Name: Phereoeca uterella
Order & Family: Lepidoptera: Tineidae
Size: Larval case is typically 10-15 mm long.
Natural Habitat
Found inside houses, frequently on walls or floors in humid environments.
Diet & Feeding
Larvae feed on spider webs, lint, wool, and other natural fibers.
Behavior Patterns
The larva constructs a protective silk case covered in debris (like dust and sand) which it carries with it as it moves.
Risks & Benefits
Generally harmless to humans but can occasionally damage wool or fine fabric. Helps clean up spider webs indoors.
Identified on: 6/3/2026