Case-bearing Clothes Moth Larva (empty case or exuviae)
Scientific Name: Tinea pellionella
Order & Family: Lepidoptera, Tineidae
Size: Larvae grow up to 10-14 mm in length. The case itself is typically 6-12 mm.
Natural Habitat
Indoors, particularly in dark, undisturbed areas such as closets, attics, storage chests, and under furniture. They prefer natural fibers.
Diet & Feeding
The larvae feed on natural fibers, including wool, silk, fur, feathers, felt, and other animal products. They can also consume synthetic blends if natural fibers are present.
Behavior Patterns
The larva builds a silk case that it carries with it and enlarges as it grows. This case is often camouflaged with bits of the material it is eating, making it difficult to spot. They are generally slow-moving and prefer dark, secluded areas. The presence of these cases (empty or with larvae inside) is a primary indicator of an infestation.
Risks & Benefits
Risks include significant damage to textiles, clothing, carpets, and other items made of natural fibers, leading to economic loss. They do not pose direct health risks to humans. There are no known direct benefits to humans, and they are generally considered a pest.
Identified on: 9/20/2025