Cluster flies

Our professional fly control is the best and most effective way to rid your home or business of flies for good.

Home / Pest Library / Cluster flies


When you need professional cluster fly control, Terminix Canada is the company you can trust.

Cluster Flies In Canada

Size: 8 to 10 mm long.

Colour: Dark grey with golden hairs and overlapping wings.

Description: Golden hairs on their thorax. Cluster flies appear narrow when resting because their wings completely overlap their back.

Order/Family: Diptera/Calliphoridae.

Scientific Name: Pollenia rudis (Fabricius).

Did You Know?

The complete life cycle from egg to adult cluster fly is about 27 to 39 days.

Cluster Fly Biology

Between 8 and 10 mm long, cluster flies are close relatives of blow flies and parasites of earthworms. Female cluster flies mate in the spring, laying their eggs in soil crevices, which take three days to hatch. The cluster fly larvae burrow into the bodies of earthworms where they continue their developing process. There are generally four generations of cluster fly larvae per year.

Cluster Fly Behaviour, Diet, Habitat and Life Cycle

Cluster flies are highly aggravating because even frigid winters won’t move them out of cozy attics and the wall voids of structures. They enter homes and businesses in early fall to seek shelter from cooling temperatures, and will get comfortable as winter approaches. Starting in mid-August, adult cluster flies seek out protected locations – preferably sunny, light-coloured buildings.

Cluster flies enter properties one at a time, but collect throughout structures in swarms, much like a swarm of bees. They enter homes and businesses through small openings such as cracks around your windows or walls. On warmer days in winter and spring, they can come out of hibernation and crawl sluggishly over walls and windows. When warmer weather arrives, cluster flies will emerge and depart the structures they’ve been dwelling in. An adult cluster fly’s diet consists of flower nectar, plant sap, and other organic matter.

Wondering How To Get Rid Of Cluster Flies?

The best way to get rid of cluster flies is to contact Terminix Canada. Our residential and commercial fly control gets the results you need.

Firstly, there is no effective means of cluster fly control for the larval stage because they develop in earthworms. Nevertheless, large accumulations of these flies can be removed with a vacuum cleaner, making them handy tools for cluster fly control. Insect light traps can also be placed in attics, but require frequent maintenance. Remember, cluster flies cannot be controlled by disrupting the life cycle of the larvae. Therefore, it is recommended to contact a pest control company like Terminix Canada for effective fly treatment.

Terminix Canada Cluster Fly Control Can Help You

Our professional fly control is the best and most effective way to rid your home or business of flies for good.

Get A Free Estimate Today

Terminix Canada Reviews

google reviews

4.1 759 reviews

  • Lokesh Gaur ★★★★★ 4 months ago
    Terminix amazing service and very professional. They heard all issues and customized treatment as per our issues. Highly recommend their service.
  • Bernie Mutter ★★★★★ 3 months ago
    Very impressed with the level of service we received. Extremely professional. Sound knowledge of the service provided. Explained the work outline clearly.
  • Ayse Nida Kurekci ★★★★★ 3 months ago
    Gage and Marshall were extremely helpful and kind! Very fun to talk to and they’re efficient with their work. We’re very happy with our balcony netting!

Coast To Coast Protection

Find your nearest local pest control expert today. With more than 30 branches across 10 Canadian provinces, you can count on Terminix Canada.