Household Casebearer (Plaster Bagworm)

Typically found inside buildings, especially on walls in humid environments where they can find dust or spider webs.

Larvae feed on old spider webs, insect remains, wool, silk, and human hair/dust high in protein.

The larva builds a flattened, spindle-shaped case made of silk and covered with sand, dust, and fibers. It can poke its head out from either end to move or feed.

They are considered minor household pests that can damage natural fiber fabrics or silk. They do not bite or sting humans and pose no health risk.