Pherecydes Casebearer Moth Larva (or Household Casebearer)

Commonly found in high-humidity indoor environments like homes (bathrooms, closets), garages, and under furniture. They attach to walls, baseboards, and carpets.

Feed on old spider webs, silk, and general detritus. They may also consume natural fibers like wool or human hair if available.

The larva constructs a distinctive flattened, spindle-shaped case made of silk and debris (sand, soil, fibers), open at both ends. It drags this case around as it moves and can turn 180 degrees inside it to feed from either end.

Generally harmless to humans (no biting or stinging). They are considered a minor pest; while they can damage wool or biological specimens, they primarily feed on spider webs and floor dust, making them more of a nuisance than a severe threat.