Plaster Bagworm / Household Casebearer

Typically found inside residential buildings, particularly on walls in humid environments, bathrooms, and garages.

The larvae feed on spider webs, wool, hair, and organic detritus found in household dust.

The larva builds a silk-lined protective case covered with sand, dust, and lint. It can extend its head and thorax from either end to crawl or feed, eventually pupating inside the same case.

They are considered minor household pests as they may damage textiles or wool but are harmless to humans; they benefit the ecosystem by consuming spider webs and organic debris.