Plaster Bagworm (Household Casebearer)

Natural Habitat

Typically found inside houses, on walls, or under furniture. They prefer humid climates and are often found in tropical or subtropical regions.

Diet & Feeding

Feeds on spider webs, silk from other insects, wool, hair, and organic detritus. They may occasionally damage natural fiber clothing.

Behavior Patterns

The larva lives inside a flattened, spindle-shaped case made of silk and covered with sand, dust, and lint. The case has openings at both ends, allowing the larva to turn around inside and protrude its head from either side to feed or move. When ready to pupate, the larva attaches its case to a wall or surface.

Risks & Benefits

Generally considered a minor household nuisance. They do not bite or transmit diseases. While they can occasionally damage silk or wool fabrics, they do not cause significant structural or health risks. They play a minor role in the ecosystem by consuming spider webs and indoor debris.

Identified on: 12/26/2025