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Cluster Fly Control
Herefordshire & Worcestershire

PGM & SON Pest Control Services | Hereford | Worcester

Professional cluster fly control for your home or business. If you need targeted treatments to effectively kill flies fast, PGM & SON are the experts, we are your award winning local BPCA pest control company that serve Hereford and Worcester.

cluster fly control -

Cluster Fly Removal Services

Cluster flies can be a detriment to any business that relies on a pest-free environment. But, because flies can enter your business every time someone opens your door, controlling them can be challenging.


PGM & SON Hereford Pest Control has extensive experience in commercial cluster fly control.In addition, and what makes us unique from other pest control companies, is that we offer sanitising and disinfecting services to remove rodent - bird - wildlife urine and droppings to create a disease-free environment for our customers, their families, and their businesses.Residential, Commercial, and Food Service establishments.

Got questions about Cluster Flies?

Cluster Flies: What Homeowners Need To Know

Cluster Fly (Pollenia Rudis)


In the summer they live and breed in fields so they are not normally a problem. Although they may enter buildings, for example:

Residential properties




Bed and breakfast


Commercial properties


Cluster flies hibernate in the Autumn and sometimes in vast numbers. They will hibernate around windows and in roof spaces. Although they are found across the UK, they are mainly found in rural areas because of their life cycle.

Call us now and speak to a Cluster Fly expert


  • The cycle is: egg, larvae, pupa, adult

  • Eggs are laid in damp soil or in rotting vegetation

  • The larvae seek out a host (normally earthworms). They are parasitic on earthworms

  • The pupae live in the soil

  • Adults are around 6mm long. Their colour is blackish and there are often 2 generations per year


Although cluster flies don’t bite, they’re considered a nuisance because of the volumes in which they migrate into a property to hibernate over winter. Naturally, you don’t want to share your property with swarms of flies and for a business, it’s not a great way to attract customers either.

Since this is a free living field insect, the life cycle is dependent on our weather. In Britain it is most likely to have two generations per year but if it’s very hot, this may be up to four.

PGM & SON; Cluster Fly Identification

Cluster Fly Identification

  • Sluggish behaviour and a low bumbling buzz

  • Flies seen late at night when the lights are on are most likely to be cluster flies

  • Agitated bouncing around near a light fitting or close to light bulbs

  • Infestation in the loft

You may see unsightly tiny dark coloured spots of excrement on walls or windows that are difficult to clean. If they die in areas such as wall voids or false ceilings you may find you have a secondary problem such as the attraction of other pests (e.g. larder beetles)


Control Measures of Cluster Flies

There is very little you can do – proofing works may help reduce the problem.

Controlling the problem is far more effective – for example, with use of insecticides (smoke generators) and treating around window frames.

Care must be taken when using any insecticide due to the possibility of bats living in the building. Bats are protected under the Wildlife and Countryside Act 1981.

PGM & SON; the breeding cycle of pests - cluster flies

At PGM & Son we see a lot of problems with cluster flies in Hereford and particularly the surrounding rural areas where it is common in Autumn for them to congregate in large numbers on the outside of buildings especially on sunny, south-east facing, light-coloured walls. As the afternoon temperatures begin to fall they tend to crawl into crevices for shelter, sometimes through window frames, but mainly under the eaves/fascia boards into the roof space.

Here are a few reasons why commercial pest control is important for cluster flies


A commercial pest control company will have the knowledge and experience to accurately identify the type of fly and the source of the infestation. This is important because it helps to determine the most effective treatment method.

Health and Safety

Cluster flies can present health and safety risks to employees and customers in commercial properties. A professional commercial pest control company will use safe and effective methods to eliminate the infestation and prevent future infestations.

Legal compliance

Many commercial properties are required to comply with health and safety regulations and standards, such as food safety regulations. A professional commercial pest control company will be familiar with these regulations and will help you to comply with your obligations.ensure that your property is in compliance.


A cluster fly infestation can damage the reputation of a business. A professional commercial pest control company will work quickly and discreetly to eliminate the infestation and prevent any negative impact on your business's reputation. Don’t worry about advertising your pest issue – ask us to send one of our unmarked vehicles to keep your pest issue discreet from your customers. 



Professional commercial pest control services are often more cost-effective in the long run than DIY methods, as they can quickly and effectively eliminate an infestation and prevent future infestations.

Tailored service

A professional commercial pest control company will provide a tailored service to meet the specific needs of your business, taking into consideration the type of building, the level of infestation, and the nature of your business.

In summary, commercial pest control for cluster flies is important for health and safety, legal compliance, reputation, cost-effectiveness and tailored service. Hiring a professional commercial pest control company. PGM & Son Pest Control will provide peace of mind that the infestation will be handled quickly, efficiently and safely, minimising disruptions to your business operations.

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FAQ Cluster Flies

Frequently asked questions about Cluster Flies

What do cluster flies look like?

Cluster flies are typically larger and slower moving than common house flies. They have a characteristic golden or yellowish-brown colour, a distinct pattern of golden hairs on their thorax.

How do cluster flies infest homes?

Cluster flies typically enter homes and buildings through small cracks or openings, such as around windows and doors. They are attracted to warm, protected areas, such as attics, walls, and chimneys.

What are the signs of a cluster fly infestation?

The most obvious sign of a cluster fly infestation is the presence of the flies themselves. They may be found in large numbers, especially in the upper levels of the home. In addition, you may notice a musty smell in the affected areas.

How can I prevent cluster fly infestation?

Preventing cluster fly infestations in the first place is the best way to control them. This can be achieved by sealing any cracks or openings around windows, doors, and other potential entry points, and ensuring that screens are in good condition.

Are cluster flies harmful to humans and pets?

Preventing cluster fly infestations in the first place is the best way to control them. This can be achieved by sealing any cracks or openings around windows, doors, and other potential entry points, and ensuring that screens are in good condition.

Are there any natural ways to get rid of cluster flies?

Yes, there are natural ways to get rid of cluster flies, such as using traps, vacuuming, and exclusion devices, such as screens, that can prevent flies from entering the home.

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