Some species do. Certain flies can spend the colder months sheltered inside attics, wall voids, and other protected parts of a building.
Flies come in many different species. If you see one in your home in the winter, it didn’t necessarily breed there.
Some species of flies, like cluster flies, enter buildings in the fall. They then hide in protected spaces and overwinter there such as wall voids or beneath siding. They might take over attics for a while. In the winter, you’ll hardly notice them except on sunnier days or perhaps when indoor heat reaches their hiding places. That can cause flies to become more active and move toward windows or other bright areas. That makes the problem look brand-new even if it’s not.
Other times, flies can breed inside. Repeated fly activity around drains, trash, animal waste, or other indoor sources might mean a different problem. Pay attention to where you see the flies to figure out what kind you’re dealing with.
If you have flies that breed indoors, the first thing to do is remove their breeding site by cleaning drains or trash and generally getting rid of decaying organic material. If you have overwintering flies, that’s a different problem. That is best prevented in advance. If you’ve had a history of fly problems, you can check window and door frames, screens, soffits, attic vents, siding transitions, rooflines, and utility line penetrations for obvious gaps. Repair damage and seal gaps as you find them and that can help reduce your fly problem in the winter.
If flies or other pests are repeatedly getting into your Fenton–Brighton home, Mosquito Squad of Fenton - Brighton can help identify pest activity and recommend an appropriate control approach. Call (810) 202-9771 or request a free quote online.
