Household Casebearer

Indoor environments, particularly on walls in humid, subtropical climates.

Feeds primarily on natural fibers like wool and silk, as well as spider webs and insect remains.

The larva constructs a spindle-shaped silk case covered in sand and debris. It carries this case while crawling and can turn around inside it to feed from either end.

Generally harmless to humans but can occasionally damage clothing or carpets made of natural fibers; provides minor ecosystem service by cleaning up spider webs.