Plaster Bagworm (also known as Household Casebearer)

Commonly found indoors on walls, baseboards, and in corners, particularly in garages, closets, and bathrooms; they thrive in humid climates.

They feed on old spider webs, dead insects, hair, lint, dust, and occasionally natural fibers like wool.

The larva constructs a protective, flattened, pumpkin-seed-shaped case out of silk and surrounding debris (sand, paint, dust) which it drags around as it moves. It stays inside this case to pupate.

Generally considered a nuisance pest rather than a threat. They do not bite or sting humans. While they can feed on wool fabrics, they usually stick to spider webs and detritus, causing minimal damage compared to true clothes moths.