Where Do Flies Nest?

When attempting to cook, eat, or enjoy the outdoors, flies are an annoyance that will make you become an expert fly-swatting practitioner. But where do flies make their nests and where do these bothersome insects come from?

No, flies don’t build nests! But they prefer warm, moist spots, such the sides of buildings, compost piles, bushes, and other plants, as well as floor drains and garbage cans, where they lay their eggs and relax.

Although flies prefer decaying organic matter, both indoor and outdoor spaces are good for egg-laying. Let’s study about flies, their preferred environments, and how to keep an infestation from happening.

How to Identify a House Fly

Identifying the type of fly is the first step towards getting rid of it. The housefly, or Musca domestica, is the most prevalent kind of fly. Houseflies have stripes that are either dark brown or black, and they are roughly ¼ inch long. Their motions are irregular and vigorous; they flap their wings at a rate of about 200 times per second.

A housefly’s lifecycle is comparable to that of other insects, with an average lifespan of 20 to 30 days:

Fertilized egg
Larvae phase (maggot)
Pupa phase

A housefly can develop from an egg to an adult in seven to ten days under the correct circumstances, particularly in the summer when the temperature is warm. Instead of building nests, houseflies deposit their eggs on dead animals, rotting food, and excrement. flies are viewed as unclean pests. However, through the breakdown of organic materials, they contribute significantly to the ecosystem.

When Are Flies Most Active?

In the summer, you may have noticed that the majority of flies are visible during the day. That’s because warm weather is ideal for them. Before they perish in the cold, flies will get together and search for a warm hiding place. To escape the cold, many would squirm into tiny cracks in doors, windows, barns, and other structures.

Houseflies thrive in temperatures between 50°F and 80°F, and they are most active during the day. Houseflies will snooze throughout the evening and be prepared to resume their day in the morning.

Where Do Flies Nest Indoors?

Although they don’t build nests, flies deposit their eggs in whatever nook and cranny they believe to be a safe place, both indoors and outdoors. Flies are drawn to rotting material, so if there is old food laying about, they will lay eggs in the house because there are food sources there.

The following are a few of the most typical indoor fly locations.

Around windows and doors
Cracks in the ceiling and walls
In and around trash bins
Light fixtures
Around pet food bowls

Where Do Flies Nest Outdoors?

It can be annoying to try to enjoy your yard only to have flies wherever you look. They will annoy everyone they see, land on your meals, and fly all over your body. In your yard during the summer, flies will inevitably be seen. But where do the eggs of these annoying beetles lay?

The following are some of the locations where flies are most frequently found outside.

In bushes and plants
Fence wires
In and around trash bins
On compost piles
On or near animal feces
Sides of structures or homes

How to Get Rid of Flies

It could be time for some spring cleaning if you see a lot of flies in your home or yard. Here are a few natural strategies you can use to drive out your new, unwanted visitors.

Keep Your Home Clean

Food spills, unclean dishes, pet food, and an abundance of moisture all draw flies. Cleaning up the debris is one of the best ways to get rid of flies. Put all food in sealed containers if it isn’t refrigerated, and use soap and water to clean up spills. Pet food dishes should be cleaned frequently, particularly if you use wet food. Additionally, since it will draw flies, clean the litter box and the surrounding area every day if you have any.

Trash cans and compost piles should be removed and cleaned, and pet feces should be cleaned up around the property if you have flies outside. Wash the affected area with soap and water if you notice flies gathering on any portions of the walls surrounding your house.

Use Fly Traps

Fly traps may not have the most attractive appearance, but they are immensely useful and functional outside. Container traps and fly paper are the two varieties. Sticky fly strips, another name for fly paper, are strips with an adhesive side and a fly attractant side. Flies become stuck when they come into touch with the sticky side. Bait is placed at the bottom of a container in container traps. The bait will entice the flies into the container, directing them toward the bottom where they will be trapped.

If you prefer not to utilize store-bought products, you can create your own homemade fly trap from common household objects. Pour leftover wine into a wine bottle, then stir in two teaspoons of maple syrup and dish soap. Using a piece of paper, create a funnel and pour maple syrup along the paper’s wall. Simply insert the funnel into the wine bottle’s neck, and presto! an improvised fly trap.

Natural Predators

The presence of natural predators helps keep flies under control outside. It’s easy to draw in these fly predators to your yard—frogs and birds both like eating flies. The American goldfinch, barn swallow, common kingfisher, ruby-throated hummingbird, and northern mockingbird are a few bird species that consume insects. To draw birds to your home, place feeders, baths, and houses in vibrant colors. To draw in fly-eating birds, you can also grow black-eyed Susans, sunflowers, and other flowers.

Candles and Essential Oils

Because flies have acute senses, certain scents will cause them to become uncomfortable and avoid your home. Typical smells that deter flies include the following ones:

Tea tree

To deter flies, use an oil diffuser or candle close to open windows. To clean surfaces both inside and outside the house, fill a spray bottle with water and aromatic oils. You may also use the mixture to spray your deck or patio.

You may deter flies and other insects from coming into your garden by planting herbs like mint, basil, lavender, and citronella.


It may surprise you to learn that a fan may effectively keep mosquitoes and flies out of your home. In windy weather, flies prefer calm circumstances and use more energy than they enjoy. Insects including gnats, flies, mosquitoes, and bees can be repelled with the use of portable or ceiling fans both indoors and outdoors.

How Many Flies Are There in the World?

There is really no way to estimate the number of flies in the planet. But they are found all across the world, even in Antarctica. It makes sense that there are different species of flies across the United States, given that there are over 120,000 species of flies. Since they may reproduce 10–12 times in their lives, flies are always in abundance.

Which State has the Most Flies?

It is challenging to identify the states with the highest concentration of flies because population levels fluctuate depending on temperature, humidity, and the availability of food sources. On the other hand, in 2021, there were roughly 1,890 monthly searches on Google for fly extermination, with a high in Louisiana.

Final Reflections

Flies are bothersome insects that can disturb us both indoors and outdoors, despite their usefulness to the ecosystem. Flies look for locations to rest and lay their eggs rather than building nests. Examine any wall openings, areas with decaying food and vegetation, garbage cans, and pet bowls. If an abundance of flies is discovered, thoroughly clean the area and place fly traps to eliminate them.