Cluster flies often invade buildings over Winter, driven by their life cycle needs and environmental changes.

Preventing cluster flies effectively requires a multifaceted approach. Our treatment includes a knockdown effect and an "en masse" exodus effect, which significantly reduces the fly population. This decrease in numbers is crucial as it lessens the likelihood of reinfestation in the following year and has shown to be particularly effective in managing cluster fly populations. In some cases, applying Diatomaceous Earth (DE) dust in loft spaces can further decrease fly numbers. Additionally, sealing gaps around fascia boards and window frames with fly mesh can also help, although this method has limited effectiveness due to the ventilation needs of UK homes. This is particularly why older buildings, with their unique structural features and increased air permeability, are more susceptible to cluster fly issues. Our comprehensive strategies are designed to address these challenges and minimise cluster fly invasions effectively.

Pollenia rudis (Common Cluster Fly):

• This is the most familiar species of cluster fly.
• It measures about 6 to 8 mm in length.
• It is recognisable by its non-metallic, dark gray to olive thorax, which is covered in golden hairs.
• The abdomen is checkered with a pattern of dark and light patches.
• The wings overlap flat over the abdomen when at rest.

Dasyphora cyanella (Green Cluster Fly):

• Slightly smaller than Pollenia rudis.
• Dasyphora cyanella has a distinctive bright green or metallic green coloration.
• They are about 5 to 6 mm in length.
• Share the same overlapping wing characteristic when at rest, which is common among cluster flies.

Thaumatomyia notata (Yellow Swarming Fly):

• This species is notable for its smaller size and yellowish color, making it quite distinct from the typical gray cluster flies.
• They measure approximately 3 to 4 mm in length.
• Often they are seen in larger swarms, especially around window frames and light sources.

The cost of our professional cluster fly treatment for residential properties is set at £140. This price reflects not only the use of our specialised equipment but also the effectiveness and efficiency of our treatment method. Unlike DIY methods, which often rely on various aerosols and smoke bomb-type products, our approach uses a highly specialised Exodus ULV machine. This equipment allows for the application of insecticides in the optimal micron range, enhancing absorption by the cluster flies and ensuring the treatment reaches even the most awkward nooks and crannies where cluster flies tend to hide. Our method ensures a more comprehensive coverage and deeper penetration into hiding spots that are typically missed by standard DIY approaches. Given the efficacy and reduced need for repeated applications, our professional treatment remains one of the most cost-effective solutions for managing cluster fly infestations effectively.

Independent efforts to eradicate cluster flies through the application of aerosol sprays and smoke bombs frequently prove insufficient. Conversely, engagement with professional pest management services, employing specialised equipment and techniques such as Ultra-Low Volume (ULV) insecticide applications, facilitates a more comprehensive and enduring resolution by effectively treating inaccessible areas.

Cluster flies are not directly dangerous as they do not bite, transmit diseases, or damage structures. However, their presence can lead to several indirect issues beyond just being a nuisance. Large infestations can soil walls, windows, and furniture with their droppings, and the sheer number of flies can be distressing to homeowners. Cluster flies can also attract mice and other small mammals seeking warmth and food during colder months. Mice often consume cluster flies, leaving behind parts like wings and thorax. This shows how cluster flies can indirectly attract rodents into homes, complicating pest control. Thus, controlling cluster fly populations is important to maintain a pest-free home, even though they are not directly harmful.