Household Casebearer
Scientific Name: Phereoeca uterella
Order & Family: Lepidoptera: Tineidae
Size: Case length is typically 8 mm to 14 mm; the adult moth is smaller.
Natural Habitat
Found inside homes, particularly in bathrooms, kitchens, and garages where moisture and humidity are present.
Diet & Feeding
Larvae feed on spider webs, natural fibers like wool and silk, and hair or dead organic matter.
Behavior Patterns
The larva lives inside a flattened, silk-lined case covered in substrate particles like sand or dust. It can retreat into the case at both ends to move or hide.
Risks & Benefits
They are considered minor household pests as they can damage fine natural fabrics and leave unsightly cases on walls. They are harmless to humans and pets.
Identified on: 3/3/2026