Household Casebearer (often specifically the Plaster Bagworm or Case-bearing Clothes Moth larva)

Commonly found indoors on walls, in closets, garages, and underneath furniture. They thrive in humid environments.

Detritivores feeding on organic matter like spider webs, wool, hair, lint, dead insects, and discarded exoskeletons.

The larva constructs a distinctive flattened, pumpkin-seed-shaped protective case out of silk and debris (sand, dust, lint). It drags this case around as it moves and can retreat inside if threatened.

Generally harmless to humans (non-biting, non-venomous). Considered a minor household pest because they can damage fabrics, wool, and carpets, but are often just a nuisance of accumulated dust and lint.