Tinea pellionella (Case-bearing clothes moth larva)

Indoors, particularly in dark, undisturbed areas with access to animal-derived materials like wool, rugs, furs, and feathers.

Keratin-rich materials including wool, hair, fur, feathers, and occasionally synthetic blends containing natural fibers.

Larvae construct a portable silken case incorporating fibers from their food source. They live inside this case as they feed and eventually pupate within it. They are typically photophobic (avoid light).

Risks: They are significant household pests that can cause extensive damage to clothing, upholstery, and heirlooms. Benefits: In the wild, they help decompose animal remains such as feathers or fur in bird nests.