Plaster bagworm

Indoor environments, often seen hanging on walls or ceilings in humid subtropical or tropical regions.

Larvae feed on spider webs, wool, human hair, and silk fibers.

The larva builds a flattened, watermelon-seed-shaped silk case covered in sand, dust, and house debris, carrying it everywhere as it feeds.

They are considered minor household pests because they can damage silk or wool fabrics, but they do not pose any direct health risks to humans.