Why do I Have So Many Flies in My House? | ABC Pest Control (2024)

Flies are a vital part of our ecosystem, as they are scavengers that consume dead and decaying matter. While flies are essential, there’s nothing more annoying than hearing their buzzing wings flying around your head. Typically, flies live outdoors. However, flies can certainly make their way into your house through windows and doors.

Though it isn’t unusual to see flies zooming or crawling around your house every once in a while, if you’re suddenly bombarded with flies, it can be a cause for concern. A fly infestation can be seriously problematic. Flies can carry disease, which can then spread throughout your home and potentially infect you and your loved ones.

Why Do I Suddenly Have So Many Flies in My House?

Understanding Fly Behavior

Flies are a diverse group of insects belonging to the order Diptera, characterized by having a single pair of wings. Understanding their behavior is crucial in addressing infestations. Flies are attracted to environments with ample food sources and suitable breeding grounds. Common indoor fly species include house flies (Musca domestica), fruit flies (Drosophila spp.), and drain flies (Psychodidae spp.).

House flies are attracted to decaying organic matter and can lay hundreds of eggs in moist areas like garbage, pet waste, or compost. Fruit flies are drawn to ripe or fermenting fruits and vegetables, as well as sugary substances like spilled juice or soda. Drain flies thrive in moist environments such as clogged drains, sewage systems, or standing water.

Why Are There So Many Flies in My House?

If your house is overrun with flies, you’re probably wondering why. What attracts the flies or where do flies come from? There can be several reasons why you have many flies in your home.

Below, we’ll cover some of the most common reasons why flies enter your home. And, provide solutions that you can use to get rid of flies in your home.

Decaying Matter

Decaying matter is one of the most common causes of a fly infestation in and around your home. As mentioned previously, flies are scavengers and eat dead and dying matter. When flies find decaying matter, they move in to consume them. Not only that, but adult flies lay their eggs in the matter as well – and they lay a whole lot of them.

Needless to say, when those eggs hatch, well, you’ll be inundated with flies. Therefore, if you find that you suddenly have a lot of flies in your house, chances are there’s decaying matter somewhere.

No matter how clean you keep your house, you probably have some rotting food somewhere. For example, garbage cans and garbage disposals. These spots are prime breeding grounds for flies.

Warm Weather

Flies need specific conditions to lay eggs that will survive. If those conditions are met, the eggs will grow into larvae. The larvae will grow into adult flies, and the life cycle continues. As mentioned earlier, flies lay their eggs in dead and decaying organic material.

However, to survive, they also need warmth. Typically, temperatures of 75 degrees and higher are ideal for most fly species. If your home has been overrun with flies, look in your home for places that are favorable for fly eggs.

A few examples of some of the spots that can offer ideal temperatures for fly growth are:

  • Bathrooms
  • Laundry rooms
  • Around appliances
  • Hot water heaters
  • Dishwashers
  • Fridges

Long Lifespan and Fast Breeding

Believe it or not, the lifespan of a fly is a lot longer than you probably realize. The average fly lives between 15 to 30 days. They also breed very quickly. How does their long lifespan contribute to the sudden onslaught of flies in your house?

If you see a few or even just one fly buzzing around your house and you don’t swat it, it could lay eggs. Then, those eggs will hatch, and become adult house flies. Those adults will lay more eggs, and before you know it, the situation will worsen, and a cluster of flies will appear. Most importantly, you should know that all it takes is a single fly to cause a fly infestation.

Helpful Tips to Combat Flies in Your House

Preventing and controlling fly infestations requires a multi-faceted approach focused on sanitation, exclusion, and, if necessary, chemical control methods. Here are some practical measures to combat the fly problem around your home:

  • Keep things clean! Not only should the trash be taken out frequently, but the trash cans should be cleaned out as well. Trash is one of the main food sources for flies.
  • Reduce the temperature in areas where the flies seem to be originating.
  • Inspect existing screens, install new screens, and don’t leave doors and windows open for a long time. Seal cracks, gaps, and openings in doors, windows, and walls to prevent flies from entering.
  • Store food in sealed containers to prevent access to flies. Clean spills and crumbs promptly, especially in kitchen and dining areas.
  • Use fly traps to catch them.
  • Repair leaking pipes, faucets, and other sources of standing water. Ensure proper drainage around the home to eliminate breeding sites for flies.
  • Act fast! If you see even just one fly, be sure to take care of it immediately.

When to Seek Professional Help

While many fly infestations can be effectively managed through proactive measures, there are instances where professional intervention may be necessary. Consider contacting pest control professionals if:

  • The infestation persists despite efforts to control it.
  • The source of the infestation is difficult to locate or inaccessible.
  • There are health or safety concerns associated with the infestation.
  • The infestation involves potentially harmful or nuisance species of flies.

Professional pest control services can assess the severity of the infestation, identify contributing factors, and implement targeted strategies to eradicate flies safely and effectively. They may also provide guidance on preventive measures to reduce the risk of future infestations.

Are you in need of fly control services in Omaha or surrounding areas? If you need to get rid of house flies, Contact ABC Termite and Pest Control for more information about how you can get your fly problem under control.

Additional Reading: How to Deal with a Housefly Infestation

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Why do I Have So Many Flies in My House? | ABC Pest Control (2024)

FAQs

Why do I Have So Many Flies in My House? | ABC Pest Control? ›

Trash is one of the main food sources for flies. Reduce the temperature in areas where the flies seem to be originating. Inspect existing screens, install new screens, and don't leave doors and windows open for a long time. Seal cracks, gaps, and openings in doors, windows, and walls to prevent flies from entering.

Why do I suddenly have a fly infestation in my house? ›

Decaying Matter

They hunt for food on countertops, trash cans, compost piles, and stagnant water. Fruit flies feed and breed on rotting or overripe fruit. Drain flies feed and breed on organic matter in your drains or pipes. So, the sudden increase of flies in your home is likely due to the presence of decomposition.

What causes flies in a clean house? ›

House flies are attracted to decaying food and organic matter on which they can feed. This includes food scraps, garbage, excrement, and decaying organic matter. Uncovered trash, pet waste, and compost can all attract flies. They assemble and lay eggs in areas with poor sanitation with fecal matter and trash.

How do you get rid of a severe fly infestation? ›

Vinegar and Dish Soap - Fill a bowl slightly with apple cider vinegar, wine or honey with some dish soap (washing up liquid). Cover the bowl with plastic wrap with punctured holes or leave uncovered. Flies will be attracted to the smell and will get stuck within the liquid.

Can pest control get rid of house flies? ›

Food contamination is one of the main reasons that fly pest control is so important. If you have a fly infestation in your home, contact a pest professional promptly. They will be able to inspect your home, confirm the species and recommend a course of pest control to treat and get rid of the flies.

How do you find the source of a fly infestation? ›

Different flies have different breeding sites, but examining your compost, garbage cans, uncovered fruit or produce, and drains for maggots is a good place to start.

How do you figure out where flies are coming from? ›

Check cracks around windows, doors, and vents as possible entry points. It is crucial to determine where the breeding sources are located and how they are entering the buildings. Rural areas where farms are present may be more problematic for the higher number of breeding sites than areas in an urban setting.

How do I get rid of thousands of flies in my house? ›

Potential methods include:
  1. Herbs and flowers. Herbs and flowers can be planted both in your garden and outside to keep flies away from your house. ...
  2. Vinegar and dish soap. A mixture of vinegar and dish soap can help you trap flies. ...
  3. Cayenne pepper and water. ...
  4. Venus flytrap. ...
  5. Natural trap bait.
Sep 20, 2019

What smell do flies hate? ›

Cinnamon – use cinnamon as an air freshner, as flies hate the smell! Lavender, eucalyptus, peppermint and lemongrass essential oils – Not only will spraying these oils around the house create a beautiful aroma, but they will also deter those pesky flies too.

How long does a fly infestation last? ›

The entire life cycle of a cluster fly generally takes four to six weeks to complete. However, by invading and overwintering indoors, a cluster fly infestation can persist for several months and continue to be a nuisance until proper removal measures are implemented.

What gets rid of flies permanently? ›

By cutting off fly access to the home and any food sources, you'll better be able to get rid of flies inside the home and keep them away for the long-term. Check and repair screens and seal around windows. Flies can find their way into the home through very small gaps.

What do flies hate most? ›

Here are some of the most noteworthy scents known to deter flies:
  • Bay Leaves/Laurel Leaves. Bay leaves, or laurel leaves, can also deter flies. ...
  • Camphor. Camphor is made by distilling bark and wood from the camphor tree. ...
  • Catnip. ...
  • Cayenne Pepper. ...
  • Cinnamon. ...
  • Citronella. ...
  • Citrus. ...
  • Cloves.

What kills all types of flies? ›

✔️Mix apple cider vinegar and dish soap.

Ideally, the dish soap will have a fruity smell. “The fermented smell from the vinegar can attract flies,” Pereira says. “But the soap is really what will kill them.” The detergent in soap will destroy the flies' digestive tract and can also break down their cell walls, he says.

How do I get rid of a fly infestation in my house? ›

A mixture of vinegar and dish soap can help you trap flies. To use this method, mix about an inch of apple cider vinegar and a few drops of dish soap in a tall glass. Cover the glass with plastic wrap. Secure the plastic wrap with a rubber band and poke small holes in the top.

How do flies get in the house when windows are closed? ›

Screens can have rips, holes, and unsealed cracks between the frame and the screen. Flies also come in through openings around plumbing and pipes, vents, and cracks in the foundation. If you have holes in your air conditioner filters or cracks around the unit, flies can come through without you even knowing.

How do you find a cluster fly nest? ›

As the number of cluster flies attracted to the building increases, large clusters of flies huddle inside wall voids, attics, and false ceilings. Most infestations occur in the upper regions of buildings, such as the attics of homes.

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