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House Flies

Summary: Have you ever been lying in bed in a small room, trying to go to sleep, and had house flies buzzing around keeping you awake? To me, there are few things more annoying than this. However, keeping you up at night is among the least dangerous things that house flies presents.  There are some very cost effective fly control products that can deter flies in a 1,000 sq. ft. area.  Check out the video and related products here


Some people claim they would never hurt a fly. Too bad the fly does not feel the same way in return. Unlike horse flies and stable flies, common house flies do not bite. However, the house fly has some pretty disgusting habits that can create health problems for people.   Luckily there are some excellent fly control products on the market today that can deter flies in a 1,000 sq. ft. area.  Check out our video and related products here

Did you know that flies can be carriers for infectious disease? Typhoid, cholera, salmonella, bacillary dysentery, tuberculosis, anthrax, and parasitic worms can all be transmitted from a fly to, say, your cheese sandwich. The next time a friend criticizes you for wildly waving your hands over your cheeseburger, perhaps muttering some kind of incantation, tell them that you are not warding off evil spirits, but you are warding off house flies. The long list of diseases spread by the common house fly will make them reconsider questioning your sanity.


House flies can be very hard to swat. They have a compound eye that can see in many directions at once, and a highly evolved evasion reaction that enables them to detect changes in air currents. This is the reason that flyswatters have holes in them to reduce air currents so flies don't realize that something is about to hit them until it is too late. Another way to confuse a fly is to swat at it from two different directions at one. Try clapping your hands together right above where a fly is resting. The fly moves so quickly upwards when it senses danger that you might crush the fly just when it thinks it is escaping to freedom.

Common house flies can reproduce at astounding speeds under the right conditions. Flies undergo a complete metamorphosis in which they change from an egg into a larvae (known as maggots) then into a pupae, and finally into an adult. The transition for a fly from an egg into an adult is made very quickly. Only a few hours are needed for a fly larva to hatch from an egg, about two more weeks to undergo all the changes to become reproductive adult. They only live for another fifteen to twenty five days, but the adult female can lay several thousand eggs over the next few weeks of her short lifetime.

Flies breed in manure. Horse manure is the preferred medium, but human, pig, cow, chicken, or other forms of manure will work just as well. Because flies have such a close connection with manure, they are synonymous with filth. Flies have hairs all over their legs that can carry particles of manure with them wherever they go, thus spreading germs to wherever they land. To make matters even more unseemly, the fly regurgitates part of its last meal onto the surface of wherever it lands, so a little bit of fly vomit will be on any food where the fly has landed.

Interestingly, it seems as if the fly itself is aware that it is dirty. Have you ever noticed that a fly frequently rubs its front legs together? It is actually cleaning its legs because there are taste and small receptors on them. The fly's legs also secrete a liquid that helps it walk on walls. The fly's body is so light that it can hang upside down from a ceiling just by the surface tension of the liquid secreted from its legs.


So, we have established that flies are gross, are germ carriers, and you don't want them around your food. You might be wondering, what is the best way to get rid of them? If you are solely concerned with keeping flies out of the house, you can use insect screens on doors and windows. Copper screens are better than painted steel screens because they do not rust. You can also reduce fly populations by using sticky flytraps, or bait traps.

The foods that attract flies have sugar or protein in them. A home remedy mixture of water or milk with brown sugar, over ripe bananas, or blackstrap molasses with an added pesticide will attract and kill flies. Insect sprays labeled for the purpose of killing flies are effective methods of pest control for killing individual flies. Avoid sprays containing poisons such as arsenic that can contaminate your home.

The very best way of getting rid of flies is to take away their breeding places. Garbage containers should be tightly closed. Compost piles should also be sealed off. Outdoor garbage should be transported to a dump, buried, or incinerated. Animal waste such as dog poo must be cleaned up. Septic tanks should not have any cracks or leaks that might attract flies. Basically, any organic waste or manure is a potential breeding ground for house flies and by removing the waste you will do a lot towards getting rid of the houseflies, that is, unless you want a personal experience with Love In the Time of Cholera. 

There are also some very cost effective fly control products on the market today that can deter flies in a 1000 square foot area.  Check out this short video and related products here

Ask Rick A Question


13 Aug 2012, 17:46
Hi. We started noticing flys in the kitchen a few weeks ago and I swated them on a daily basis. Then they got more numerous. And then we found maggots in our garbage and on the floor near the garbage. We steamed cleaned every surface and thought they would go away, but they have not. It is getting worse. That was a week ago and today I came home to about 30-50 in the kitchen. I am going to check the house plants and put them outside. And I will clean the sink drains but I doubt that is it. I keep 2 dish pans full of water in the sink do soak dirty dishes before loading the dishwasher - do I have to get rid of this?
23 Aug 2012, 13:51
I just moved near a water treatment center, no smells at all however after settling in, i realized that there are 100's of flies,everywhere! I am disgusted and want to know how to manage this problem. put up strips and they are full within 2 hours! the cielings of the home, covered! I asked the neighbors and they say it is an issue for everyone that lives in that area... what can I do? would an exterminator help?
Ask the Exterminator
23 Aug 2012, 15:19
You won't be able to stop the flies. You can kill them once they come to your house, but it sounds as if this is going to be an ongoing problem.
25 Aug 2012, 15:27
Yesterday I found a row of dead flies in my garage all up against one wall. There must have been at least 100 of them or more. No trash cans or anything on that side of the garage. I know they were not there the day before because that is the side I get into my car. It was like someone lined them up from the back to the front of the wall.
What could have been the cause of this?
07 Sep 2012, 13:08
Out of no where, two days ago, flies started to appear in my yard. I thought it was from the heat and ignored it until yesterday when I found them all over my dogs in the yard. These flies literally bit up the corners of my dogs ears. I flipped when I saw this, ran to them and brought them in the house. I cannot even take them outside through the front door as the flies are swarming to my dogs. NO idea what is going on. My yard is spotless and cleaned daily.

An emergency visit from the Pest Control company on top of that too and they claimed it's coming from a neighbors yard. I called the neighbor and they said that their side of the yard which faces mine is all concrete and she didn't see flies. Under their deck is completely filthy never cleaned for years. I think something is dead under there like a bird or a stray cat.

What can I do to help. They are reluctant to check, there's no odor, only now we've lost use of our yard and so have the dogs to play, they're big ones too, 3 German Sheps. Please help

Thank you
Kristen Savee
16 Sep 2012, 22:53
We are having maggots come our of our one ac vent, what can we do to get ruid of them? Would our pest company be able to help us as all?
17 Sep 2012, 11:12
My room is in the converted attic, and every time I open my windows flies fall out of the vents inside. They aren't normal houseflies they are big dirty ones. It's almost like they come in to die. DRIVES ME NUTS!
Can you tell me what attracts them to this spot?
I haven't opened one of my windows for over a year now, for a fear of a biblical plague-like situation.
Ask the Exterminator
17 Sep 2012, 21:06
Read my article on cluster flies.
24 Oct 2012, 18:13
We have flies. 2-3 a day. They are slow and somewhat easy to kill. From all the other posts (I read most) I need to find their breeding ground. How will I recognize this breeding ground? Will there be maggots or some other sign to let me know this is the spot?
Ask the Exterminator
06 Nov 2012, 16:33
They are probably cluster flies. Check your attic space. You will see the flies resting in warm places.
17 Dec 2012, 23:18
Big flies keep appearing in my window its getting so annoying we keep our doors closed shut our home is sanitized trash goes out the door not sure where they coming in tha attic?how do they get in there?the fireplace? ?? any body have any suggestions.... Thanks!
20 Apr 2013, 03:38
Like many of your readers I to have a fly problem. I kill about 10 and within a short time another 10 appear from nowhere. We have had possums in the ceiling previously but they seem to escape outside eventually. But what puzzles me is how do the flies get in. Do they squeeze in through the light fittings? Please help, it's driving me crazy.
01 Jul 2013, 11:24
Over the past 3 summers we have noticed an infestation of flies develop in our basement. We finally think we have found the source which happens to be around our recess lighting on the ceiling in our bathroom. I have used insect killing sprays to no avail. The more we kill, the more that appears. Please, any suggestions will be greatly appreciated.
01 Jul 2013, 15:20
We have had an explosion of little house flys and regular house flys in our town. They seem to be all over the farm. How can you tell where they are coming from? We have a lot of agriculture in the area, but also have seen flies miles away from the barns. We have some poultry houses, dairy farms, beef and horses. anything different about the flies from these animals that could help tell where they came from?

bradley spangler
03 Jul 2013, 13:24
why do flies get on my face when i go to sleep
05 Jul 2013, 03:55
Good day, I live in a 6yrs old townhouse & flies have been invading my space for the past two yrs. My door & vents are close all the time but they still find a way to get inside the house. The house is clean, garbages are not left out. I have a gas fire place so I don't come from the chimney. I think it's Blow flies because they are fairly large, metallic green. Please any idea/comments of how to get prevent them from entering my house will be appreciated.
09 Jul 2013, 19:57
We moved into a new constructed house at the end of April. Then they finally came the other day to grade the lot to get ready for grass. Now there seems to be a crazy amount of flies in my basement. I can't find anything they would be attracted to. Could it be possible that the moving of all the dirt could have caused this? Our basement has the big escape window that is half above ground.
14 Jul 2013, 17:17
I found a dead rat under my washing machine 2 weeks ago. I disposed of the body and these HUGE flies are everywhere. They will not go away and I do not keep my windows or doors open! I bought and have been using raid that zaps them from the mist but they keep coming back there muust be about 15huge flies every day. help!
30 Jul 2013, 16:36
There are bottle flies all over my living room and dining room, and I got rid of the trash which might have been the reason they're coming in. But, once I get rid of the source, how long will it take for them to leave?
31 Jul 2013, 20:24

Please help! My house here in Chicago faces West. Behind my house the front of the garage also faces west.

I noticed house flies sitting all over my siding on the west side of the garage. I hit the siding to startle them away but, they came back. As I walked to the front of my house, I noticed all over my front door and around it (the siding of my home) House flies were just sitting there in masses. I took a step back and noticed flies all over the front of my house sitting there.

I have no dead animals in the area. It hasn't rained in a while. I do have grass that I cut maybe every week and a half.

It is emabarressing and I get nervous that this will get worse. I do not want my children nor my mother to get sick (If that's possible)

Any sprays? Tricks? Advice?

Thank you for helping us all out!!
Ask the Exterminator
31 Jul 2013, 21:36
You can treat the side of the house with a product called Talstar P. I sell this product on my website.
Teresa Mills
01 Aug 2013, 15:29
I went on vacation for two weeks and came home to dozens of dead flies on the floor in the kitchen and dining room area along with the window sills. After a few hours I noticed about a dozen flies flying around. What could be the cause. I didn't have a fly problem before I left. I didn't leave any garbage or food around. The house was closed up and got pretty warm. I am concerned about future infestation.
26 Aug 2013, 12:56
It has been really hot out so we have been leaving our windows open they have no screens so we havebeen getting flys coming into the house . Well this morning my husband killed one and noticed it looked a little funny when he looked closer it had all these little redish bugs attached to it its soo nasty and its freaking me out what could they be?
02 Sep 2013, 15:07
We have about 150 small cows next to our property that stay in a barn. The flies are terrible and I can't take it anymore. Can't even set on our porch as the flies won't leave us alone there are so many. Please help me and any ideas of how to get rid of them around my home so we can enjoy the outside again and inside as when coming into house they always seem to get in. HELP
Ask the Exterminator
02 Sep 2013, 20:08
Go to this link for all sorts of fly control products.
24 Sep 2013, 16:47
I had just moved into a new apartment. I am on the top floor of a four storey building. I constantly have house flies trying to come in my patio door. I have a screen on the door and they are always on the screen and on the screen in the windows. I have no garbage lying around, and I scrubbed down the screen and I scrubbed all the balcony down, but they don't seem to stop. I believe the carpet in the condo must have been soiled by some pets, as there were I few big stains. I shampooed the carpets multiple times and can not smell anything coming from where there were stains. I hate flies and have a fear of them. I noticed that over the summer they sometimes got in to my place through cracks in the screens, so I taped up the screens so they could crawl through, but I don't understand why they keep wanting to come in. They seem to want to get into my place only. What can I do to keep them off my balcony and away from the screen
Ask the Exterminator
24 Sep 2013, 17:00
Various species of flies will migrate towards light reflecting off of exterior walls and windows. Once the flies land they warm themselves in the sun. When the sun starts to go down, the flies move upwards seeking tiny cracks and crevices where they can get shelter from falling temperatures. The crevices of your house or apartment often leads into attic or wall spaces. When temperatures rise, the flies become active and frequently find openings that lead into your living spaces. You can treat exterior surfaces with products listed under the "Fly" category on this website. Click on "Pest Control Products" at the top of the page.
Rachel Bailey
20 Oct 2013, 15:53
We have just moved into a new build house, the front of my house is often covered in black flies, the sit on bricks and windows, why? Worried about summat being mixed in the cement
27 Jan 2014, 17:19
Everytime I cook roasted broccoli and leave it on the stove or kitchen counter, I notice about 10 flies comes in my house. I don't understand why only for broccoli. I think they come from the kitchen aspirator.
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