Household Casebearer
Scientific Name: Phereoeca uterella
Order & Family: Order: Lepidoptera, Family: Tineidae
Size: Case length is usually 8mm to 14mm; the hidden larva is smaller.
Natural Habitat
Typically found inside residential buildings, often on walls, ceilings, and in corners with high humidity.
Diet & Feeding
Larvae feed on spider webs and natural fibers like wool, hair, and fur. They also consume organic debris and lint.
Behavior Patterns
The larva builds a flattened, spindle-shaped silk case covered in sand, dust, and spider webs for protection. It can move by poking its head out from either end of the case.
Risks & Benefits
They are considered minor household pests because they can damage woolen clothing or carpets. They do not bite or pose a direct health risk to humans.
Identified on: 4/4/2026