Winter often seems like an odd time to deal with flies, yet a fly outbreak can occur even during the colder months. These infestations commonly involve cluster flies or house flies, both of which seek warmth and shelter. You may expect insects to hibernate or die off in winter – however, this is not always the case. Understanding why fly outbreaks happen in winter is key to managing these unwelcome guests.

Cluster flies: The winter invaders

Cluster flies are among the most common culprits behind a winter fly outbreak. Unlike house flies, cluster flies do not breed indoors. Instead, they enter buildings to hibernate, often hiding in attics, lofts and wall cavities. These flies prefer south facing or sunlit parts of a building, which stay warmer during winter.

When central heating or warmer winter days disturb their hibernation, cluster flies may emerge in large numbers. They often gather around windows or light fixtures, looking for a way back outdoors. Unfortunately, the sudden appearance of these small black flies can cause significant stress.

To prevent cluster flies, it’s important to seal cracks and gaps around windows, doors, and roofing. Regular loft inspections can also help identify early signs of these flies before they become an issue.

House flies: Persistent year-round pests

Unlike cluster flies, house flies can breed indoors throughout the year if they find a suitable environment. Warm indoor conditions combined with food waste or decaying organic material create the perfect breeding ground. During winter, house flies may lay eggs in hidden spots, such as bins, drains or pet food bowls.

When a fly outbreak involves house flies, it often indicates an underlying hygiene issue. In addition, house flies themselves carry bacteria, spreading diseases as they move between food and waste. This makes it vital to address infestations promptly.

Removing food sources, emptying bins frequently and ensuring proper drainage can significantly reduce house fly numbers. Additionally, fly screens and traps can help control the outbreak and prevent further entry.

Managing winter fly outbreaks

Whether you are dealing with cluster flies or house flies this winter, prevention and swift action are essential. Blocking potential entry points, improving cleanliness and addressing structural vulnerabilities will help keep flies at bay. However, large infestations may require professional pest control services.

We offer comprehensive solutions to manage a winter fly outbreak effectively. Our team ensures flies are removed and provides advice on preventing future issues. Call us today for help.