Fly Invasion at Pentucket




Source: Julia Rossi





As you have probably noticed, there are many flies infesting our classrooms.  These pesky and irritating animals that drive your teachers insane are actually just here for warmth to avoid the dropping temperatures.


After measuring the length of two flies which were about 6 mm long 7 mm long, the conclusion was that they were either Cluster flies or House flies.  After taking a closer look, the flies were dark in color and had grey stripes on their backs.  This means that they are most likely House Flies, which happens to be the most common species out of about 300,000.


The most common reason house flies move into houses is for warmth or food.  When temperatures drop for the fall, flies move inside.  Flies do not want to die in the cold and look for warmth from the autumn winds.  A house fly most likely laid eggs right next to the school.  When the flies eggs were laid nearby, the flies often fly inside in search of food or another place to lay eggs.  


House flies only live for about a month before they die.  Someone would think that this would mean the amount of flies will slowly dwindle away, but flies have alarming reproductive rates, so the amount offsets each other.  According to, one female can lay up to five or six batches of 100 eggs.  These eggs then hatch in twelve to twenty-four hours.  

This means that these bugs are probably not leaving anytime soon.  Sadly, no matter how hard we try, we have no control over the flies all around our school.  They will continue to lay eggs and the eggs will hatch releasing more and more flies.  Hopefully, the flies will soon go back outside and stop disrupting our classrooms.