Anthrenus verbasci

Varied Carpet Beetle

Family: Dermestidae · Class: Insecta · Order: Coleoptera

The varied carpet beetle is a small, cosmopolitan beetle in the family Dermestidae. Adults measure 1.7 to 3.5 mm (0.07 to 0.14 inches) in length and are broadly oval in shape. The elytra (wing covers) display a distinctive mottled pattern of white, brown, and dark scales, with three irregular crossbands of white and yellow scales that give the species its "varied" appearance. The pronotum is dark with light-colored scale patches, and the antennae are short and clubbed. This non-native species was introduced to North America from Europe around 1850 (BugGuide 2025). The varied carpet beetle now occurs throughout the United States and southern Canada, with established populations across California. The species has spread widely due to human commerce and transportation of infested materials. In California, it occurs in both urban and rural environments, from coastal areas to inland valleys. Varied carpet beetles inhabit a diverse range of environments, particularly those associated with human habitation. Adults are commonly found in homes, warehouses, museums, and other buildings where natural materials are stored. They also occur outdoors in bird nests, animal burrows, and areas with accumulated organic debris. The species thrives in environments with low humidity and stable temperatures, making heated buildings ideal habitat. Adults are active during spring and early summer, typically emerging from April through July. They are attracted to light and flowers, where they feed on pollen and nectar. Common host plants include flowers of the Asteraceae and other families with accessible pollen. The larval stage is the most destructive, feeding on a wide variety of natural materials including wool, silk, fur, feathers, leather, and dried plant and animal products. Larvae develop through 5-11 instars over several months to more than a year, depending on environmental conditions and food availability. Females deposit 40-90 eggs in cracks, crevices, or directly on suitable food sources. The varied carpet beetle is considered a significant household and stored product pest rather than a conservation concern. Larvae can cause extensive damage to clothing, carpets, upholstery, museum specimens, and stored foods. In California, the species is particularly problematic in the textile and museum industries, where it can destroy valuable collections and artifacts. Unlike many native beetle species, varied carpet beetles benefit from human activities and urban development. No conservation status has been assigned to this species, as it is a widespread, introduced pest species that requires management rather than protection. The species is not listed under any state or federal conservation programs. Population control typically involves integrated pest management approaches including sanitation, temperature treatments, and targeted insecticide applications when necessary. The varied carpet beetle serves as an example of how introduced species can successfully establish and spread in new environments through human-mediated dispersal.

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, and more.