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Converging Cluster Flies

Cluster Fly

Cluster Fly by: NPMA

You may spend plenty of time shooing away household flies in your kitchen who like to make their appearance apparent over most of the summer months, but there is another household fly that makes its debut in early fall. The Cluster Fly, which hails from the Blow fly family (but has much better sanitary skills), is a little larger than a House fly. Cluster flies are a dull gray and have golden hairs on the thorax, which gives them a sparkly sheen. Upon watching their habits, you’ll notice that they are much more sluggish than the typical house fly. Cluster flies are often called attic or window flies, as you can find them in those locations rather than flying around your kitchen.

The process of life for the Cluster fly has much to do with worms. Adults will leave their overwintering sites in the Spring and will lay eggs in the soil where there are earthworms. The hatching larvae enter earthworms and finish the maturing process. With the onset of autumn, Cluster flies will seek secure overwintering sites. Preferred sites are secluded areas of homes and buildings, such as attics and wall voids.

During the autumn you’ll find Cluster flies congregating on the sunny side of buildings and buzzing in windows. They use scent to attract other flies; this sweet scent can even be smelled by humans. Cluster flies will not damage your home, but they can leave small stains on walls and curtains, especially when crushed. They do not hover and land on your food like the average house fly, and are not known to carry or transfer any diseases.

The best method to rid your home of Cluster flies is to start with early prevention techniques.

  • Seal and caulk cracks and crevices around the foundation, windows and doors.
  • Make sure all screens around the home are secure and free of openings.
  • Contact a pest management professional if the problem warrants it.

The pest specialists at Safeway Pest Management are knowledgeable and ready to help with your fly problem, or any other insect problem that may be bothering you. Give us a call at 262-679-4422 or 800-956-0800 or visit us on the web at www.safewaypest.net.

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Filed under Cluster Fly, Flies