We are experts at dealing with Cluster Flies.

What’s a cluster fly, you might ask?

It’s easy to lump all flies into the same category, but the easiest way to identify a cluster fly is if he’s brought his mates along with him! The name cluster fly literally refers to the fact that these particular flies are often found in large numbers, or clusters. If you have a garden with a compost heap, you might have seen a cluster of them in the vicinity at some point during the spring or summer months.

For Fast, Reliable, Effective Cluster Fly Treatments

All our Technicians are RSPH Certified. We are specialists in the removal of many varieties of pests that invade people’s homes. Where cluster flies are concerned, we know their habits, their life cycles, and the locations which they favour for their hibernation.

We have the right tools and we know the appropriate solutions that will target the problem.

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Facts and Problems

These are dark greyish flies about 8mm long with yellowish hairs on the back and with overlapping wings. 

Cluster flies aren’t generally a problem all-year round, but they can be a nuisance when it gets to autumn and they start looking for somewhere to hibernate. Until then, they’re happy to spend the summer months outdoors living off a diet of earthworms, but when the temperature gets cooler, they start to look around for somewhere warm to sleep for the winter. You can probably imagine where they end up, or maybe you’re reading this now because your home has been targeted by them.

Although these flies are not a sign of an untidy home, nor are they disease spreaders, it’s understandable that home owners in don’t want to share their living space with large numbers of them! It doesn’t take much for them to enter a home, whether it’s through an open door or window, or by more covert means: around the edges of a window frame or skylight, or the eaves of your house if your home has suffered wear-and-tear from the elements.

If a cluster fly finds its way in on its own, there’s every chance more will follow. Each fly transmits a scent, or pheromone, which attracts others to follow. If a large number of cluster flies find their way into your home, the combined smell of the pheromones they give off can be very potent – you might have noticed a sweet and sickly odour but not realised what it was. The flies will hibernate over the winter in locations such as your loft, or may remain within and around window frames themselves.

It’s therefore possible you might not notice or be bothered by them immediately. Maybe you’ll find yourself swatting away one or two every now and then and wonder whether they’re coming from. But by the spring the rest of the cluster will once more emerge and getting them out of your home might prove difficult. Also, once cluster flies have visited a property on one occasion, they have an annoying habit of returning. The best solution is to fully exterminate them in order to significantly lower the chances of this happening.

As with most unwanted home invaders, once they’re in, cluster flies can be very difficult to get rid of. This is particularly the case if you’re planning on trying to dispose of them yourself. First of all, you have to know where they are hibernating, although once they are inside a property, they may choose a number of hibernation sites around the house. It’s easy enough to insect-spray a cluster fly that’s visible to you, but there could be many others tucked away in cracks, crevasses and hard-to-reach places.

Loft space is a popular location for cluster flies to hibernate in, and they can be difficult to remove if the inside of your roof is cramped or not easily accessible by people. Pumping large quantities of insecticide through your roof hatch is a bit of a lottery as it may still not get rid of all of them, and as we’re always pointing out for the public’s own good, be very wary of the quantities and any combinations of insecticides you might be using as this could be more detrimental to your own health than that of the cluster flies.