Carpet beetle identification
Correct identification is the essential first step. Several unrelated beetles — Hide Beetles, Museum Beetles, Bird Nest Carpet Beetles, and Cabinet Beetles — share a similar appearance, and misidentifying the pest leads to wasted treatment effort. Read the species descriptions below carefully before beginning any treatment program.
The four most common carpet beetle species:
Black carpet beetle (Attagenus unicolor)
The most widespread and destructive species. Adults are uniform glossy black, 3–5 mm long. Larvae are elongated, carrot-shaped, and covered in short brown hairs, growing up to 8 mm. They are strongly attracted to wool, feathers, fur, and dried foods. Damage typically appears as large, irregular bare patches in carpets and woolens.
Varied carpet beetle (Anthrenus verbasci)
Adults are roughly 2–3 mm long and display a distinctive mottled pattern of white, brown, and yellow scales. Larvae — often called "woolly bears" — are banded with alternating light and dark stripes and have tufts of bristle-like hairs at the rear. They feed on wool, silk, leather, feathers, and dry animal products. Damage appears as small, scattered holes or surface grazing rather than the larger bare patches caused by the Black Carpet Beetle.
Common carpet beetle (Anthrenus scrophulariae)
Similar in size to the Varied Carpet Beetle, but its scales form a reddish-orange stripe down the center of its back, bordered by black and white patches. Larvae closely resemble those of the Varied Carpet Beetle. Food preferences and damage patterns are essentially the same.
Furniture carpet beetle (Anthrenus flavipes)
Slightly larger than other Anthrenus species. Adults display a yellow and white mottled pattern. This species is particularly destructive to the hair padding and feather stuffing inside upholstered furniture, making it easy to overlook an infestation until significant interior damage has already occurred.
Related beetles sometimes confused with carpet beetles
Hide beetle (Dermestes maculatus)
Adults are 6–10 mm — noticeably larger than carpet beetles — and dark brown to black with white markings on the underside. Larvae are dark, hairy, and can reach 14 mm. They are primarily a pest of hides, skins, dried meat, fish meal, and pet food. Control methods are essentially the same as for carpet beetles.
Museum beetle (Anthrenus museorum)
Common in museums and private collections where it damages natural-history specimens, taxidermy, dried plant material, and wool textiles. Adults are very small (2 mm) and dull brown. Treatment follows the same protocol as for other carpet beetles.
Cabinet beetle (Trogoderma inclusum)
Attacks stored dry foods as well as natural fibres, feathers, and insect collections. Adults are small (2–4 mm) with mottled brown and red patterning. Larvae are the most visible stage — pale with dark banding and long hairs. The cabinet beetle is closely related to the Khapra beetle, a significant quarantine pest in many countries.
Odd beetle (Thylodrias contractus)
An introduced species whose wingless females cannot fly, so dispersal occurs mainly through the movement of infested goods. Larvae lack the long abdominal hairs of other carpet beetles but have coarse bristles across each body segment and tend to curl into a ball when disturbed. They attack dry animal products, woolen cloth, and silk. Treatment follows the same approach as for carpet beetles.
