Household Casebearer
Scientific Name: Phereoeca uterella
Order & Family: Lepidoptera: Tineidae
Size: Case length typically 8-13 mm; the larva inside is smaller.

Natural Habitat
Found inside houses, particularly in areas with high humidity, on walls, and under furniture.
Diet & Feeding
Larvae feed on spider webs, wool, silk, hair, and other organic debris in the home.
Behavior Patterns
The larva constructs a protective silk case flattened like a pumpkin seed, incorporating dust and sand for camouflage. It remains inside the case, extending its head to move and feed.
Risks & Benefits
Harmless to humans but can be a minor pest by damaging delicate natural fabrics or creating unsightly cases on walls.
Identified on: 1/8/2026