Household Casebearer

Natural Habitat

Typically found inside residential buildings on walls, ceilings, and under furniture; also found in warm, humid outdoor environments.

Diet & Feeding

Larvae feed on spider webs, wool, hair, silk, and other natural keratin-containing fibers or organic debris.

Behavior Patterns

The larva constructs a protective silk case covered in sand, dust, and debris. This case is open at both ends, allowing the larva to feed from either side and retreat inside when threatened.

Risks & Benefits

Generally considered a minor household pest because they can damage natural fiber fabrics, rugs, or silk. They are harmless to humans and pets as they do not bite or sting.

Identified on: 1/3/2026