The reason for slow-moving flies at my office's window?

Question

In the past few months(ever since autumn started), I've noticed that my office's window has been unofficially serving as a hangout for flies. A lot more flies have been flying and buzzing around this window than during the previous warm summer months. These flies tend to be a little larger than normal and much slower-moving than normal, i.e. easy to swat and kill. Last week, I killed as many as 5 flies in one day from that particular window. Today I killed 2 more.

Is there a reason for this??

Perhaps flies become slower and dumber in their last days of life after the summertime ends? Has anyone else observed this? Or, do you think there is some kind of chemical near the window that is attracting them there?(the window seems pretty clean to me, other than a little dust)

Answer 1

Houseflies seem to move fastest when it's in the 80's and low 90's. They seem to absorb and need that heat energy. I'm sure they are attracted to the window because sunlight is a prime source of heat. But it's fall, temperatures are dropping and the place by the window is probably cooler, so they move slower. As far as being bigger, they may be females looking for a place to raise their families, in which case, you've probably cut down on your office's fly population by several hundred.

Answer 2

The drop in temp the cooler it get's the slower the fly note the avg fly lives 28-30 days

Answer 3

Honey! a person put honey on your window-use bleech first