Bug Identifier
Household Casebearer Moth
Community identification

Household Casebearer Moth

Phereoeca uterella

Order & Family
Lepidoptera (Moths and Butterflies), Tineidae (Fungus Moths/Clothes Moths)
Size
Larvae (in case): 10-15 mm long. Adult moth: Wingspan 9-13 mm.
See this bug in the Encyclopedia

Natural Habitat

Indoors, particularly in quiet, undisturbed areas like closets, attics, storage rooms, wall voids, and under furniture. Can also be found outdoors in sheltered locations.

Diet & Feeding

Larvae feed on natural fibers (wool, silk, felt, fur), synthetic materials, spiderwebs, and sometimes insect remains. Adults do not feed.

Behavior Patterns

Larvae construct a case from silk and debris, which they carry with them. Adults are typically nocturnal and attracted to light. Females often lay eggs on suitable materials for larval development.

Risks & Benefits

Risk: Considered a household pest as larvae can damage fabrics, carpets, and other stored materials containing natural fibers. They do not pose direct health risks to humans. Benefit: No significant direct benefits to humans, but play a small role in decomposition within their natural outdoor habitats.