I feel like I am walking into this one but I have to know, how exactly does a fly act "funny"? There has to be some level of coincidence since I don't know you personally but I will go out on a limb and say I'm pretty sure the word "entomologist" does not appear on your resume. They can't respond to every phone call you place because it would be an astronomical waste of tax dollars to chase down each incident to confirm it's validity. There needs to be some empirical evidence of something for them to take action. But if you need a hobby I guess you could do far worse and I am sure that you brighten the day of whoever you end up speaking to when you do call.
I have not seen a fly that acts funny yet so I cannot tell you. To sense something correctly, you have to first read correctly.
A mosquito acts funny when you hit it couple times but it will still stay in front of your eyes and try find a spot to bite at noon-the hottest time in the middle of Union St car park of Flushing where there are mostly concrete not dirt of our backyard. This is not the usual time, nor usual habitat for most common mosquito to look for a bite.
Most mosquito species are crepuscular (dawn or dusk) feeders. A mosquito will follow the radiant to your body heat, thus unless you are standing still or walking backwards, they usually bite from the back where you cannot see. This is a fact known to biologist and many college students-it's in the text book. In fact, many documentary on TV talks about that too. I am sure the libraries still have some videos of the behaviour of mosquito, if you want to find out more. This happens to me couple times and friends actually cracked up when they saw it and called them robo mosquito. This prompted me to report. I am sure I am not the only person who reported abnormal amount or abnormal behaviour of the mosquito during those time. During thoese days, neighbours would complaining to one another that there were so many mosquitos when we met in the front yards going to work or when we were coming back from work. When you lived in an infected area, your could sense it first hand and you would react more aggressively towards the changing environment.
Probably they(depart of health and DEP) are paid to do that, everytime I called to report a bird drop dead, they do want me to hold the body(if it's within my property) for them to collect. Obviously, they treat danger of dieases much more seriously than many of us. They react to a bird drop dead as strongly as a rat bites a human being. When they gather(given) enough data, enough replication of same type of reports will prompt them to further investigate whats' going on. Without these reports, they are on their own and most data are lost to the trash collection.
This is a statement from Department of Health:
"Because crows are an especially good indicator of West Nile virus, it is critical to report all dead crows. The reports themselves are vital information, used to help track the virus and determine where it may be most active."
I consider these pair of flys are acting normal.
When an arrow mosquito bites a human being, I would consider it VERY abnormal and would definitely report to all agancies concerned.