The Real Nashville Pest Control

4836 Old Hickory Blvd
Hermitage, TN 37076
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Cluster Fly


House flies and cluster flies are commonly mistaken as each other. Cluster flies are usually much larger in size, ranging from 3/8 to ½ of an inch. Usually, cluster flies enter into homes whenever they are looking for a warm environment during the colder months. They like to hide inside attics and crawlspaces, and “cluster” around windows and doors. If you have noticed cluster flies in and around your home, you should call Nashville Pest Control and they can send a professional, and certified exterminator to get rid of them for you.

Appearance and Life-cycle:

Cluster flies, as previously stated, are larger than regular house flies. They range from 3/8 of an inch to ½ an inch. They are not metallic looking, like house flies, rather they are brown in color with black lines that go down their bodies. Their life-cycle usually begins when the female cluster fly lays her eggs within the soil in the late summer and early fall months. In the soil, they molt and pupate, becoming adult cluster flies. This process usually takes about 27-40 days before they reach maturity.

Habitat and Behavior:

Cluster flies try to find warmer areas to live and nest in the cooler months, and cooler areas to live and nest during the warmer months. This makes your home the best environment for them to live. They can easily crawl through small openings making your windows, doors, and attics an easy access for them to come into your home and make their nests. During the winter months, when the sun hits certain areas of the house, those spots become warm and the cluster flies migrate towards those areas, like windows and light fixtures. When they are crushed, they can leave stains on your curtains and/or walls.

Level of Danger:

Since cluster flies make their nests in the soil and not in human food like house flies, they do not transmit diseases, or bacteria everywhere they go. They do not bite or sting, and are not of any danger to humans. They are simply considered a nuisance pest that invade your warm, and cozy home.

Signs of Infestation:

Seeing cluster flies in and around your home is the biggest sign of infestation. If you do not know if you have an infestation, call Nashville Pest Control today to talk with one of our certified and professional exterminators.


To prevent this pest, seal all cracks and crevices around your home. Also make sure that window and door screens are replaced and are not damaged. Preventing cluster flies can be a headache on your own. That’s why you should call the real Nashville Pest Control and have them treat and prevent them for you!