Phereoeca uterella (or similar Plaster Bagworm/Household Casebearer)

Natural Habitat

Commonly found indoors on walls, in corners, on carpets/rugs, and in closets. They prefer warm, humid climates like Florida and tropical regions.

Diet & Feeding

Larvae feed on hair, spider webs, wool, dead insects, and other fibrous detritus found in homes.

Behavior Patterns

The larva constructs a distinctive flattened, pumpkin-seed-shaped case made of silk and debris (sand, soil, fibers), which it carries around for protection. It eventually pupates inside this case. They are often seen dragging their case up walls.

Risks & Benefits

Generally considered a nuisance pest rather than dangerous. They do not bite or sting humans, but they can damage natural fibers like wool rugs or clothing if infestations are heavy. They help clean up small organic debris but are unwanted houseguests.

Identified on: 2/18/2026