CLUSTER FLIES

How to Identify Cluster Flies?

 

Cluster flies are dark grey in colour, or green, or more commonly grey and white with a checkerboard print down their back. They measure between 4mm and 8mm in body length. To the untrained eye, they look very similar to house flies. They begin to appear in spring when they start to lay eggs in outside environments but choose the warmth of our homes to hibernate during the winter months. They are particularly difficult to get rid of as their life span can be as long as 2 years opposed to the usual life span of less than 3 months for a normal house fly. Unfortunately it is very easy for cluster flies to infest your home as they can get through doors, windows, loose cable openings, and vents. To recognise an infestation of cluster flies, look for large amounts of dead flies or gatherings around lights and felt insulation layers. In autumn and Spring, you will see them warming themselves on the sunny side of your house.

 

How Do You Get Rid of Cluster Flies?

 

Non-professional methods of removing cluster flies can prove ineffective, however there are some methods that you can try to help rid you of your pest problem. You can use conventional insect sprays, fly boxes, electric killers, or a hoover. If you manage to control the problem, then you need to effectively seal all openings around the exterior of the house such as doors, windows, and electrical sockets. 

 

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How do you prevent Cluster Flies?

 

To prevent cluster flies, you need to make sure that you try to seal all small holes to stop them having any access routes into the home. If you have previously had cluster fly problems, then we suggest using fly screens on your doors and windows to prevent them getting in through large open spaces.

 

Do Cluster Flies Pose a Risk to Humans?

 

There is no proof that cluster flies have a strong impact on our health or are a vector of disease when we come into contact with them in the home. However, the excrement produced by the flies can ruin the colour of soft furnishings and paint and bring a pungent smell into the home. The biggest issue they can cause is within businesses such as restaurants as you cannot prepare food in infested environments. This could lead to the business being shut down or fined.

 

How Do We Remove Cluster Fly Infestations

 

Professional pest control companies will use insecticidal fogs and smoke generators to control and eliminate largely populated infestations. However, it is very common for infestations to be recurring year on year, so this may not be a permanent solution and preventative measures must be put in place. If a treatment is carried out after the first hard winter, and again in the spring when they are beginning to breed, then the chance of having an infestation the next autumn drastically decreases. Sometimes, if the timing is right, you may never see a cluster fly in your home again.

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