Household Casebearer (also known as Plaster Bagworm)

Indoors, typically found on walls, baseboards, in closets, and under furniture. They thrive in humid climates and are often associated with cobwebs in corners.

Detritivore; feeds on old spider webs, dead insects, lint, hair, and occasionally woolen fabrics or furs (keratin sources).

The larva constructs a flattened, pumpkin-seed-shaped case out of silk and debris (sand, dust, paint flakes) which it carries around for protection. It can emerge from either end of the case to move or feed.

Generally considered a nuisance pest rather than a threat. They do not bite or sting. While they can damage natural fibers like wool, they often feed on existing house dust and spider webs.