Household Casebearer Moth
Scientific Name: Phereoeca uterella
Order & Family: Lepidoptera, Tineidae
Size: Larvae typically grow up to 10-15 mm (0.4-0.6 inches) in length, carrying a case that can be 10-20 mm (0.4-0.8 inches) long. Adult moths are small, with a wingspan of about 10-12 mm (0.4-0.5 inches).
Natural Habitat
Commonly found indoors in homes and buildings, particularly in areas with accumulated dust, lint, pet hair, and natural fibers. They prefer dark, undisturbed places like closets, attics, under furniture, and forgotten corners.
Diet & Feeding
The larvae feed on a variety of materials including wool, felt, silk, fur, hair, and dust. They are known to consume pet hair, lint, and even spiderwebs. Adult moths do not feed.
Behavior Patterns
Larvae weave silk cases that often incorporate debris, allowing them to remain camouflaged. They are mostly active at night. Adult females typically cannot fly. Both larvae and adults tend to avoid light.
Risks & Benefits
Potential risks include damage to natural fiber textiles (clothing, carpets, upholstery), stored wool products, and fur. They do not pose a direct health risk to humans. There are no significant benefits to the ecosystem.
Identified on: 8/17/2025