Case-bearing Clothes Moth Larva

Natural Habitat

Indoors, particularly in dark, undisturbed areas such as closets, attics, storage chests, and under carpets. They prefer natural fibers.

Diet & Feeding

Keratin-containing materials, including wool, fur, feathers, silk, felt, bristles, and even synthetic blends or cotton if stained with food or body oils. They are significant pests of stored fabrics and animal products.

Behavior Patterns

The larva constructs a portable case from silk and the fibers of the material it is eating, which it carries with it and enlarges as it grows. It remains inside this case for protection. Larvae are typically slow-moving and avoid light. The adults are small, golden-brown moths that are poor flyers and tend to scurry or hop. Damage to textiles is caused primarily by the larval stage.

Risks & Benefits

Risks: Significant economic pest, causing damage to clothing, carpets, upholstered furniture, and other items made from natural fibers. They do not bite humans or transmit diseases. Benefits: None identified beyond serving as a food source in natural ecosystems (which is not relevant to their pest status indoors).

Identified on: 9/18/2025