Household Casebearer

Indoor environments, particularly in humid areas, on walls, or near spider webs

Scavenges on detritus, including dead insects, spider silk, hair, and wool fibers

The larva builds a flattened, spindle-shaped case from silk and environmental debris (sand, lint, etc.) which it carries while feeding; it can emerge from either end of the case

Mostly a nuisance; can occasionally cause minor damage to wool clothing or natural fiber rugs, but is generally harmless to humans