Household Casebearer (often commonly called Plaster Bagworm)

Natural Habitat

Typically found indoors in humid climates, often seen on walls, ceilings, and in corners of garages or closets. They construct a flat, pumpkin-seed-shaped case to live in.

Diet & Feeding

Detritivores feeding on old spider webs, wool, hair, dead insects, and other organic debris found in dust.

Behavior Patterns

The larva drags its protective case around with it as it moves. It can feed from either end of the case. They eventually pupate inside the case before emerging as small moths.

Risks & Benefits

Generally harmless to humans and pets; they do not bite or sting. They can be a minor pest if they damage wool clothing or rugs, but generally, they just clean up dust and cobwebs.

Identified on: 3/8/2026