Are you facing the unusual fly infestation lately? or might think why are there so many flies in the house all of a sudden? Here is the answer that Rentokil prepare to answer your question!
Finding flies sneaking their way into your house, and buzzing around can really get you annoyed. But, unfortunately, some of the common species of flies such as housefly or bluebottle fly are almost anywhere you live.
Some people may find flies are harmless in any way. In fact, flies are known to be responsible for spreading a range of diseases and infections to humans. This is certainly not surprising, due to the fact that flies feed and live in dirty places before inevitably contaminating human foods.
There are several things about your house that can make it more attractive to flies. And turns out that this might be the reasons for so many flies around or inside your house lately.
In this article we will cover the reasons for so many flies in the house, and what steps can you take to get rid of flies.
Why so many flies in my house?
One thing for sure is flies reproduce at surprising rates in a short time! Hereinafter, the same as the reason for other pests infesting your house; flies also enter your house for some reasons, including a search for shelter, food, and water (or humidity).
Therefore, these are the 4 reasons why are there so many flies around my house:
- Reproduce quickly
- Their eggs are located near the food sources
- Eat almost everything
- Depends on warm temperatures
1. Flies reproduce quickly
The reason for so many flies at your house so sudden is mainly because they can multiply quickly in a short amount of time!
Flies average lifespan is generally not long between 15 – 30 days, depending on several factors including species, food availability, and environmental conditions. Although the adult flies are not very long-lived, it doesn’t mean that they can’t multiply quickly in a short time.

Flies are known to reproduce quickly in large numbers, and potentially become a serious problem over time – especially if it’s left uncontrolled.
On average, a single female house fly can lay up to 500 eggs within 6 batches during her lifetime. It only takes between 7 – 10 days for the fly to complete their life cycle from the egg stages to adult flies. Soon after the adult flies emerge, these adult flies are ready to get inside or around your house for finding food and place for breeding.
2. Flies lay their eggs near to the food sources
This little filthy pest need a food source in order to breed, and eventually those food sources also serve as the breeding ground to lay the eggs.
Flies typically breed outdoors, but this doesn’t mean that they can’t breed indoors. They will enter your house through many openings and will definitely head to the dirtiest spot inside your house in search of food and breeding ground. Some of the best spots for many flies to go is including your kitchen garbage bin and dirty drains.

Your garbage bin is always filled with smelly and rotting daily food waste that often become the reasons for so many flies inside your house. If you could see the presence of larvae (or maggots) it is a strong indicator that they have been able to lay their eggs on food waste inside your garbage bin!
On the other hand, drain flies or moth flies are other fly species that do indeed breed and get food sources inside your house. Drain flies attracted to stagnant water; and its larvae are known to feed on moist decaying organic matter right at the opening of your drain.
3. Flies will eat almost anything in your house
Similar to rats and cockroaches, flies are also known to be omnivorous pests. Although they don’t have a mouth or teeth to digest their foods, but they have a sponge-like mouth that helps to absorb food.
Flies will eat almost anything. They are attracted to many things inside and around your house, including decayed, fermenting, or rotting organic matter. Either in the form of human food, or even to a thing that we don’t consider as food, such as animal excrement or garbage.

Because of that, we may often ignore many things inside the house that we don’t think or consider will be attractive to flies. In fact, our negligent habits on many things could be the trigger for so many flies getting inside our house; including without limitation:
- Leave the garbage bin in the kitchen left open will easily attract house flies and bluebottle flies
- Leave drain dirty and clogged will attract both drain flies and house flies at the same time
- Don’t immediately dispose of the animal carcasses around the house will summon the bluebottle flies to come
- Leave ripened fruit or vegetables on the kitchen counter top uncover will attract fruit flies
Interesting read: What do flies eat?
4. Flies depends on warm temperatures
Have you noticed why we find so many flies in the rainy season? Well, you are not alone!
Most flies like warm temperatures the most. Flies will develop faster and feed prolifically to enlarge their population under the warm temperatures. Under normal temperatures, house flies will hatch to larvae within 20 hours. But when the temperatures reach 32 – 37 °C, fly eggs can hatch 2.5 times faster or less than 8 hours.

On the contrary, during the wet season, certain fly species become inactive and will seek temporary shelter. Some of them will move into cracks and crevices of a building as a secured place. While some others will get inside a building including your house through gaps or openings around the house to keep them warm.
Once they get inside your house, you will normally see them flying low and lazily around a room as well as wandering around places like ceiling, floor, and window glass.
How to get rid of flies in my house?
Having one or two flies flying inside your house may not raise the concern. But what about finding they come in large numbers all of sudden? This simply means that you are now facing a heavy fly infestation in place!
Before it’s too late, there are 3 fly preventive measures that we recommend to be apply in order to prevent them from entering your house:
1. Keep your house clean
Many fly species are drawn to the filth that is associated with garbage, waste and/or scraps. Keeping your house clean by doing decent waste management, including keeping your garbage under tight lids and removing it regularly can help prevent flies from finding your home attractive to them.
Also, do not place the garbage bins close to your windows as well as to the access to your house.
2. Block the access for fly entering your home
Ensure that windows are sealed, cracks in walls and foundations are repaired. After dark, keep your windows and doors closed or block out the light with curtains.
Install window screens (especially in the kitchen area) to make sure that flies do not find a way inside your home.
3. Keep flies on the areas where food is readily available
Store food in sealed containers and make sure to clear food debris and liquid spillages immediately, particularly from under kitchen units and appliances.
Get rid of fly infestation in house with Rentokil
The most effective solution to get rid of flies is by enlisting the help of a professional fly control service. At Rentokil, we offer fly control services and solutions for residential properties, including:
- Controlling any potential breeding sites indoor and outdoor
- Professional advice on practical steps you can take according to the PEST approach for the best long-term solution to your fly problem
Contact Rentokil to get more information about fly control services today.
Very nice information thank you for sharing it.