Household Casebearer Moth (larva)

Scientific Name: Phereoeca uterella

Order & Family: Lepidoptera, Tineidae

Size: Larvae can grow up to 10-15 mm (0.4-0.6 inches) in length, while their cases are typically 10-20 mm (0.4-0.8 inches) long.

Household Casebearer Moth (larva)

Natural Habitat

Commonly found in human dwellings, particularly in undisturbed areas like closets, attics, storage rooms, and under furniture. They prefer dark, damp environments.

Diet & Feeding

Larvae are scavengers and feed on a variety of organic materials, including wool, hair, silk, lint, and other detritus. They are known to infest carpets, clothing, and stored natural items.

Behavior Patterns

Larvae construct a case from silk and debris, which they carry around for protection. They develop through several instars within this case before pupating inside it. Adults are typically short-lived and may not feed.

Risks & Benefits

Potential risks include damage to natural fibers (wool, silk, fur) in clothing, carpets, and upholstery. They are considered household pests. There are no notable benefits.

Identified on: 8/26/2025