Household Casebearer or Plaster Bagworm

Natural Habitat

Typically found in homes, garages, and humid environments. They are common in tropical and subtropical climates, often seen on walls, in corners, or underneath spiderwebs.

Diet & Feeding

They feed on old spider webs, silk, wool residue, hair, dead insects, and general household dust/lint.

Behavior Patterns

The larva constructs a flattened, pumpkin-seed-shaped protective case out of silk and coating it with sand, soil, or debris from its environment. It drags this case around as it moves. The larva can turn around inside the case to feed from either end.

Risks & Benefits

They do not bite or sting humans. While technically a pest, they are generally considered a minor nuisance rather than a serious threat. They can occasionally cause minor damage to woolen fabrics or rugs, similar to clothes moths, but usually feed on debris.

Identified on: 3/6/2026