Household Casebearer moth larva

In and around houses, particularly on walls in humid environments, bathrooms, and garages.

Larvae feed on spider webs, woollen fabrics, and hair; they may also occasionally eat organic detritus.

The larva builds a flattened, spindle-shaped case from silk, sand, and dust; it can turn inside the case and extend its head from either end to move or feed.

Generally harmless to humans but considered a nuisance pest as they can damage natural fibers and silk materials in the home.