Plaster Bagworm (larval case)

Natural Habitat

Commonly found indoors on walls, especially in humid environments like garages, bathrooms, and closets. They thrive in tropical and subtropical climates.

Diet & Feeding

Detritivores. They feed on old spider webs, wool, hair, lint, dead insects, and dried animal skins.

Behavior Patterns

The larva constructs a protective, flattened, pumpkin-seed-shaped case made of silk and debris (sand, dust, lint). It carries this case around as it moves. The case has openings at both ends to allow the larva to turn around inside.

Risks & Benefits

Generally considered a household pest. While they do not bite or sting humans, large infestations can be nuisance and may cause minor damage to woolen fabrics, carpets, or rugs, similar to clothes moths.

Identified on: 2/25/2026