Carpet beetle (likely larva or partial shed casing)

Found indoors in dark, undisturbed areas such as closets, carpets, baseboards, and ventilation ducts.

Larvae feed on animal-based proteins including wool, silk, leather, feathers, and pet hair.

Larvae actively avoid light and hide in fabrics, while adult beetles emerge in spring to feed on pollen outdoors.

Larvae cause significant damage to textiles, rugs, and stored organic materials, but do not bite humans or transmit diseases.