Cluster flies are a nuisance to humans and can rapidly infest a home by means of entering homes in late summer or early fall to escape declining temperatures. The adult fly will commonly cluster in dark corners and wall voids, or any other protected area. They are often seen on windows of rooms with infrequent rooms, hence the title “attic fly”. Stimulated by warmth and light, once activated, these quickly become a pest.
Cluster flies are known to contaminate food sources. Lacking any distinct stripes on the thorax, cluster flies are covered short light hairs and are slightly larger than the average house fly.
Fruit flies are also categorized as a nuisance pest and contaminator of food. These flies typically thrive in food establishments where their increase in number rapidly. Fruit flies can contaminate food with bacteria and various disease-producing organisms. Varying from light to dark brown, these pests have distinctive larvae that contain a long breathing tube at the rear of the body.