They are different from the most common other flies you will see in your home, the Common House Fly and the Blue Bottle, and do not pose the same health risks, thankfully. Cluster Flies are a group of flies which as the name suggests cluster at certain times of year. The difference is their yellowish golden hairs on the thorax and a prominent dark and light coloured chequered pattern on their abdomen. They are greyish olive in colour and adorned with golden hairs which makes them quite distinctive to the trained eye. Cluster flies may be a nuisance, but they won’t reproduce within your structure and do not carry any diseases. Cluster flies are actually a parasite of earthworms and thrive in areas where there is fertile soil. Cluster flies (8 – 10 mm) are larger in size than a house fly (6 – 7 mm) but smaller than a bottle fly (10 – 14 mm). Cluster Fly Repellents to Repel cluster flies away. With a mostly black body, their thoracic hairs are short, curly, and yellow to golden. The eyes of the most common cluster fly (Pollenia rudis) are a deep red. Cluster Fly Infestation? Adult cluster flies resemble house flies but are slightly larger, about 5/16 inch long, narrower and nonmetallic gray. The Problem with Cluster Flies. Cluster flies appear similar to the common house fly and blow/bottle flies. Cluster fly repellent are meant to repel or kill insects and can be used indoors as well as outdoors. A cluster fly is a black fly that is slightly larger than a regular fly. They get their name from their characteristic behaviour of congregating in groups of hundreds and even thousands in lofts, small spaces and window frames. They move slowly. They do not transmit disease. When crushed, they give off an odor like buckwheat honey. EnviroPest has been protecting local homes and families for over 20 years. Flies you find in the fall and into the winter are known as cluster flies. But, because cluster fly larvae are parasitic on earthworms, and earthworms are an important part of the soil fauna, the larval stage of the cluster fly is not a practical target for control. Cluster flies and seasons (summer and winter) When fall comes, the flies begin to become a nuisance. The large, black, pesky flies that show up in bed rooms and on window sills from late fall through early spring are a common household pest. Cluster flies are a bit darker and have dark and light chequered pattern on their abdomen which house flies or bottle flies do not have. They are a nuisance, especially in the large numbers they can sometimes get to. Flies can breed rapidly, are unhygienic and an annoyance. The only feasible control methods for cluster flies center around keeping the adults out of house and killing those that do manage to get inside. You could easily get cluster flies confused with a regular housefly. Cluster flies can be very distressing when they turn up in the autumn and sometimes in the spring too. Not Your Average Fly. However, there are slight differences in their looks. A house fly problem can be frustrating, but an infestation of the pesky cluster fly can be problematic to a much larger extent. In fact, the only damage you’ll likely see are small dark-colored spots of excrement on windows and walls. Exclusion is the best method of controlling a cluster fly investation. Do you see large flies in the house all of a sudden? A reader asks: My mom has lived in her condo for 35 years. Flies in this family are often metallic in appearance. Although it is quite easy to swat and kill cluster flies, your primary objective should be to prevent them gaining access in the first place. You can use these measures to fly-proof your premises. Cluster flies are often confused with house flies because they tend to look like a very big house fly; however, if you look more closely, you will see that they are lacking the metallic sheen that houseflies possess and have distinct stripes behind their head along with golden hairs on their thorax. Habits & Life Cycle Of Cluster Flies. House flies are gray in color, while most cluster flies appear black. Cluster Flies closely resemble House Flies, but they are usually larger (3/8”-1/2”) and have a yellowish sheen on the thorax. Where Do Cluster Flies Come From? Contact Modern Pest for a FREE QUOTE today! The common cluster fly (Polleniarudis) is large and black and they are very similar to house flies so can easily be mistaken for them. They have tufts of crinkly yellow-orange hairs where their wings attach to the thorax. Needless to say we are worried. The cluster fly averages between 1/4 to 3/8 inch long. Adult cluster flies are dark grey in colour, 8 to 10 mm long, and have numerous golden or yellowish hairs on thorax. Body: Light and dark gray-checkered abdomens. It is the most common of all domestic flies, accounting for about 91% of all flies in human habitations, and indeed one of the most widely distributed insects, found all over the world. It can be recognized by the short, golden colored hairs on its thorax, the part of the body to which the legs and wings are attached. How to Get Rid of Flies, How to Get Rid of House Flies, How to Kill Flies in the House Home Remedies - Duration: 6:24. Here is how to confirm which fly you are dealing with. First it was regular sized house flies, but towards the end of summer it looked like horse flies. They’re both just pests that you want to get rid of from your house! They are dark gray, never metallic blue or green. This article will outline a bit more about what cluster flies are and what you can do to eliminate them in your homes. Or call 1-800-323-PEST. House flies often grow no larger than ¼ of an inch long, while cluster flies grow to be twice as large, measuring ½ of an inch long. The thorax of an adult cluster fly is covered in short, golden hairs and the wings overlap when at rest. Take advantage of price discounts for volume orders. Home > Cluster Flies. This is the blog for you. Here at Key West Pest Control, cluster flies are a pest we face regularly during the cooler months. They are slightly larger than the house fly and appear to fly more sluggishly. A Cluster Fly is often confused as a housefly or the horse fly because of their similar appearance. Found cluster flies in your house or simply want to defend against the problem? Their abundance varies from year to year, possibly in relation to the amount of rainfall through the summer. New Taurus SC is a water-based suspension concentrate of 9.1% Fipronil that is used for pre and post pest control treatments to prevent flies like cluster flies outside. Cluster flies will hibernate in several areas of the house, which is why they can be hard to eliminate. Cluster flies belong to a family of flies called Pollenia and are medium sized, about 10mm in length. Cluster flies like to lay their eggs on lawns, areas that have earthworms within the soil. Cluster flies can be recognised by their distinctive stripes behind the head, short golden hairs on their thorax and a mottled light/dark grey abdomen. One night we counted twenty-two flies. Cluster Flies Facts, Identification & Control Latin Name. Some characteristics that differentiate the cluster fly: they fly somewhat more slowly than the house fly, they almost always fly toward windows on the warm side of a structure and their wings overlap almost completely, when at rest. 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