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Dealing with a Cluster Fly problem

Cluster flies are similar in size to the house fly, common throughout the UK and are known as such due to their habit of forming large clusters when looking for places to hibernate.

During the warmer weather, typically summer and early autumn, Cluster flies will be outdoors but as the weather becomes cooler, they search for shelter and this may take the form of lofts, attics and roof spaces or other sheltered parts in buildings.

The flies will come out and fly around if the weather warms up and as they are attracted to light, will often find their way into the human living space which although unsightly or unpleasant, is not considered to pose health risks to humans as they do not carry or transmit disease, however, make sure any water tanks in loft areas area covered.

Cluster flies have nothing to do with dead carcasses or maggots and poor hygiene does not play a part in cluster flies frequenting a property.

Control of Cluster flies can take several forms:


Always better than cure, if possible, preventing entry is an excellent method of controlling cluster flies, block holes & small gaps around door and window frames, missing bricks or mortar, air ventilation bricks can be covered using Mouse Mesh, this will allow air through but will stop the passage of insects & rodents. However access to all the areas they frequent may not prove possible and so this is not a method that can always be employed.

Once the flies are in, they can be dealt with in several ways:

Electric Fly Killers.

The flies are drawn to the device by ultraviolet light and are then killed either by an electric grid or by becoming stuck to a glue board. If the area is not visited regularly, a glueboard type fly killer can provide the safest option as there is no electric grid, removing the danger (slight as it is) of sparks or arcing if the unit becomes swamped with thousands of dead fly bodies. The Fusion range of fly killers can prove a good choice as they feature large double sided glue boards. If an electric grid machine is preferred, then using an extra deep Cluster Fly collection tray is recommended.

If there is no electrical supply or the budget won't stretch, then a cheaper alternative can be found by using a Fly Stick or Sticky Fly Papers, both prove very effective against cluster flies.


Whilst conventional aerosol sprays may be used on small groups of Cluster flies, often the sheer number is too great and so using an insecticide such as the new Insectaclear Power Fogger becomes a more suitable alternative. This is simply activated and the area vacated making it much easier to deal with large amounts of insects in one go. After two hours, re-enter the area and vacuum up the dead bodies.

Bird Scarer Manufacturer, Supplier of Bird Control and Pest Control Devices

Martley Electronics, a top resource for pest control devices. Dealing with the hassles of unwanted pests can be easier using the latest electronic solutions, there are new technologies in pest control often more humane and less intrusive than was previously available.

Martley Electronics has been manufacturing bird scarers and other pest repeller devices since the early 1990’s, giving us over two decades of experience helping you with your pest problems. Our bird scarer range has evolved through the years with all machines being designed and manufactured in the UK and shipped to users with pest or bird control problems all over the world.

Every pest control issue is different. Perhaps you need to scare away feathered intruders without disturbing humans or other animals—if this is the case, our silent bird repellers may be the right solution for you. These use high frequency or ultrasonic sound to scare away birds without adding noise pollution.

Bird scaring is not the only problem we offer solutions for, we have devices for cats, badgers, rats & mice, foxes, moles and many other types of common pest, also wireless security devices that help protect your property from human intruders too.

Shopping with Martley just makes sense. We are a family-run business that offers friendly, personal service and will work with you to satisfy all your pest control needs. We make every effort to offer low prices, and affordable shipping options.

Next time you find yourself facing a pest control problem, do not feel like you have to face it alone. Contact Martley Electronics and let us help you find the right device that can rid you of whatever pest happens to be getting under your skin.