Life Cycle of Carpet Beetles

All species of carpet beetles undergo complete metamorphosis, passing through the egg, larval and pupal stages before developing into adults. Most carpet beetles develop up to four generations yearly, while varied and black carpet beetles develop only one. The life cycle of a carpet beetle ranges from two months to several years in length. Larval food sources play a significant role in determining the duration of a carpet beetle’s growth cycle.

life cycle chart
Carpet Beetle Life Cycle Chart (click to enlarge)

Eggs & Larvae
The life cycle of the carpet beetle begins when an adult female lays her eggs. Carpet beetles can lay their eggs indoors, although they may also infest the nests of birds, mice and other insects. After mating near sources of light, females can lay more than 100 eggs at a time, which will hatch into larvae within seven to 35 days. Adults are capable fliers; therefore, carpet beetles can move from room to room, allowing for rapid infestation. Carpet beetle larvae feed on feathers, fur, silk, wool and other natural materials. Larvae can survive for several weeks without food.

Pupae & Adults
The duration of the carpet beetle’s pupal phase varies, and adult carpet beetles emerge in spring or summer. Carpet beetle young develop into adults within nine months to two years, while adults survive only a few weeks.