Bug Identifier
Case-bearing Clothes Moth Larva
Community identification

Case-bearing Clothes Moth Larva

Tinea pellionella

Order & Family
Lepidoptera, Tineidae
Size
Larvae: 10-14 mm (0.4-0.55 inches); Adult moths: wingspan of 9-16 mm (0.35-0.63 inches)
See this bug in the Encyclopedia

Natural Habitat

Indoors, particularly in dark, undisturbed areas where animal-based materials are stored, such as closets, attics, and storage chests. They can also be found in natural settings feeding on animal remains.

Diet & Feeding

Keratin-containing materials, including wool, fur, feathers, silk, felt, and leather. They also feed on lint, dust, and synthetic fibers if they contain traces of natural animal products.

Behavior Patterns

The larva constructs a portable silken case incorporating fibers from its food source, which it carries with it as it feeds and grows. It rarely leaves this case. The case grows with the larva, being enlarged or refurbished as needed. Adults are poor flyers and prefer to walk or run. They are nocturnal and are attracted to light but typically stay in darker areas where their larvae feed. The full life cycle from egg to adult can take 2-3 months to 2 years, depending on environmental conditions and food availability.

Risks & Benefits

Risks: Significant pest of textiles and natural fibers, causing damage to clothing, carpets, upholstery, and stored animal products. They do not bite or sting humans and are not known to transmit diseases. Benefits: In natural ecosystems outdoors, they play a minor role in decomposition by breaking down animal remains and discarded natural fibers.