Weird Question About Flies

Updated on July 14, 2019
M.6. asks from Woodbridge, NJ
7 answers

My assistant decided yesterday to prop the front door to the office open (it's a direct to outside door from the reception area). About 4 hrs later, she comes to tell me she has to shut the door because the lobby has about 100 flies in it. Because we have really tall windows, and the flies decided to all hang near the top, there was no way to swat them all without a ladder. I told her that I would stop somewhere the next day and pick up a fly sticky or something since I didn't know how else to get rid of all these new "tenants."

Next morning, show up - every single fly in dead on the floor. Every one of them.

Office is temperature controlled so it didn't get too hot or cold during the night. I can't believe that they all were at the end of their life cycle at exactly the same time! I'm concerned that there is something environmental in the office that killed them (like a chemical or something?) that we can't smell, but we are being exposed to . . . or is that silly?

I tried doing a little research online, but didn't see anything that would point to why this would occur naturally. Maybe a mom (or their hubby) works in pest control and knows a reasonable answer so I don't have to have any testing done in the office for weird chemicals.

Thanks in advance!

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answers from Atlanta on

if you have a cleaning crew that came in? They probably sprayed something.

If not? I don't know what to say. I know there are flies that only live like 24 to 48 hours.

4 moms found this helpful


answers from New York on

Maybe the flies had an illness?

Which reminds me of the old joke:

What do you call a fly that is ill?

The flew.

4 moms found this helpful


answers from Portland on

I'm just thinking of flies like mayflies (that live a day) .. I wonder if there is another species like that (Are you in Alaska?). Maybe Google.

I don't know if it depends if they have nothing to eat?

3 moms found this helpful


answers from Chicago on

When you find out can you let us know? If it is safe that is. I have flies here and if there isn't something seeping into the air that can destroy us I'd like to say good bye to our little tenants. I am really guessing that some sort of cleaning crew took care of this while you were all at home.

3 moms found this helpful


answers from Norfolk on

They dry out and die.
The air conditioning pulls a lot of moisture out of the air and most bugs will dehydrate sooner or later.

2 moms found this helpful


answers from Washington DC on

that is weird. while great that the pests are dead, i'd be concerned about this too.

do you have a cleaning crew? might they have sprayed them?

if not, you may want to go ahead and get it tested. i'd much rather know than not.


2 moms found this helpful


answers from New York on

Currently staying at my mom's house and whenever she gets a fly in the house and can't swat it, she shuts it up overnight in the bathroom (they're attracted to the light) and voila - it's dead in the morning. I don't know enough about flies to say why.

I'd be concerned why so many flies flew into your lobby and hung out - something dead in the ceiling, like a mouse? You'll know if more flies start appearing out of nowhere. Yuk!

2 moms found this helpful
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