Learn about Carpet Beetles today so you’ll be prepared for when they come this spring season. The Facts about Carpet Beetles Carpet beetles are tiny round insects that range from 1 to 4 mm in length and have black, white, and yellow coloration. The adult carpet beetles are good fliers and usually can be found around windows and lights. Pollen from flowers are the adult carpet beetle’s food of choice and also feed on seeds and plants. Carpet beetle larvae will feed on animal and plant materials such as hair, grains, dead insects, process foods, fabric, and furs. The adults are usually active during the daytime and are attracted to ...