Household Casebearer (often the Plaster Bagworm or a generic Clothes Moth larva case)

Typically found indoors in high humidity environments, closets, under furniture, or on carpeting and stucco walls.

Feeds on natural fibers like wool, silk, and cotton, as well as spider webs, dead insects, and human hair/dander.

The larva constructs a protective, flattened, silk, pumpkin-seed-shaped case which it drags around. It can retreat inside this shell completely when threatened and often climbs walls.

Generally considered a pest. They are not harmful to humans (no biting or stinging) but can cause minor damage to clothing, rugs, and fabrics in the home.