Household Casebearer (Plaster Bagworm)

Typically found inside residential buildings, particularly in humid environments like bathrooms, kitchens, and garages. They are often seen on walls and ceilings.

Larvae feed on spider webs, wool, human hair, fur, and silk. They may also consume dead insect remains.

The larva builds a protective, spindle-shaped case from silk, sand, dust, and lint. It can poke its head out from either end to move and feed. At maturity, it attaches the case to a vertical surface to pupate into a small moth.

Generally harmless to humans and pets, but considered a minor household pest. They can cause minor damage to natural fabrics and woolens, but their presence usually suggests high humidity or the presence of cobwebs.