Case-bearing Clothes Moth (Larval Case)

Natural Habitat

Typically found indoors in dark, undisturbed areas such as closets, under furniture, in carpets, or storage boxes where natural fibers (wool, fur, silk) are present.

Diet & Feeding

The larvae feed on keratin-rich materials including wool, fur, silk, feathers, felt, leather, and sometimes accumulated dust or pet hair.

Behavior Patterns

The larva constructs a portable, flattened case out of silk and debris (sand, fibers) which it drags along with it as it moves. It can turn around inside the case to feed from either end. When ready to pupate, it seeks a crack or crevice and seals the case.

Risks & Benefits

Risks: Represents a significant pest to households and museums; larvae cause irreversible damage to clothing, carpets, tapestries, and taxidermy by chewing holes in them. Benefits: None in a domestic setting; in nature, they aid in the decomposition of animal remains (keratin).

Identified on: 3/2/2026