Household Casebearer Moth (larva)
Scientific Name: Phereoeca uterella (larva)
Order & Family: Lepidoptera, Tineidae (clothes moths and their relatives)
Size: Larval case typically 5-15 mm (0.2-0.6 inches) in length; the larva inside is smaller.
Natural Habitat
Commonly found indoors in homes, particularly in closets, drawers, attics, and basements where natural fibers are stored or dust accumulates. They prefer dark, humid environments.
Diet & Feeding
Natural fibers such as wool, silk, hair, felt, and furs. They can also feed on soiled fabrics, lint, dust, and spiderwebs. Sometimes found feeding on cereals or other dried foods.
Behavior Patterns
Case-bearing insects that construct a silken case around themselves, incorporating fibers from their food source. They drag this case around as they feed and grow. They are often found in dark, undisturbed areas. Larvae can move quite quickly when disturbed, retreating into their case.
Risks & Benefits
Potential risks include damage to natural fiber clothing, carpets, upholstered furniture, and stored textiles. They are considered a minor pantry pest but a more significant fabric pest. No known benefits to humans or the ecosystem.
Identified on: 8/29/2025