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Another fascinating post from Diamond Pest Control...

winter fly

Why Are There Still Flies In Winter?

One thing you may have noticed is that, generally speaking, insects seem to go away in winter. Whether it’s wasps or ants, many pests seem to disappear during the colder months. Unfortunately, some types of fly do not have this tendency. You’ll see flies of one sort or another during every season of the year – even in winter. But why does this happen, and why are these winter flies so incredibly persistent?

Why flies in winter are causing a problem

Many pests go into some type of dormant state in winter. Some become very slow and their activity levels reduce. Some actually go into a state of suspended animation. Some do not need to eat when doing this, and will only emerge once the winter is over.

london street in winter

Going on from this point, the reason we still get flies in winter is simple. Flies do not need to hibernate. That being said, you will see less of them during the winter months. This is usually because of the colder conditions. What this usually means is that flies seek somewhere to shelter during the winter. Occasionally they will invade your home, which is why you will sometimes encounter winter flies indoors. The biggest reason winter flies come inside that it protects them from the elements, although there are fly control products that help to keep flies out

Your home provides flies with several things

Most houses are heated to unnaturally high temperatures during the winter these days. This artificially creates the type of warm environment that flies need to breed. It can be hard for flies to find food during winter. Your home also provides them with a rich abundance of food that is scarce outdoors. Inside your home there is more than enough nourishment for them to feed off.

london street in winter

What you also need to understand about flies is that they breed at a tremendous rate. When you have one fly, more will very quickly follow. This is why flies in winter can become such a big problem. They enter your home, find shelter, find food, and start to reproduce. If you don’t do something about this quickly, you’ll more than likely be stuck with flies into the spring. And when summer comes around, these pests start breeding even quicker, causing an even greater problem.

The best to avoid this is by keeping your home clean. Do not create an environment where flies can take hold. And if you do end up with an infestation, call a professional fly control technician as soon as possible. If you run a food based business, this becomes even more essential.


Sally has been writing on the subject of pest control for 4 years. She always carries out extensive and in depth research and always tries to bring you the most up to date, interesting topics.

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