The larva of this species can be distinguished from that of its relative, the common carpet beetle (Anthrenus scrophulariae), by the presence of a bundle of hairs on the posterior end which is constantly vibrating.

The vibration of the organ is an antipredator adaptation that helps to repel predators such as pseudoscorpions (Chelifer sp.)

[1] Sexual behavior includes a "characteristic headstand posture" assumed by the female beetle when she releases her sex pheromone, which has been identified as (Z)-3-decenoic acid.

It feeds on hair and fur, horns, silk,[1] wool, bristles, feathers,[3] skin, bone,[2] and tortoise shell.

[6] In nature, carpet beetles live and feed in the nests of birds, rodents, insects, and spiders.

[3] This species also readily attacks plant-based and synthetic materials if they have animal fibers integrated into them[3] or are stained with blood,[2] feces, or animal-derived oils.

[1] It does significant damage to upholstered furniture, carpets, and fabrics of cotton, linen, rayon, and jute.

[2] The larva has also been noted to feed on mold, dry cheese, and casein, and it can damage wood and cardboard.