Small Black Flies Under My Deck

[luds]

I've noticed over the last week or so that I consistantly have maybe a half dozen to 10 small flies flying around under my deck which is around 5 ft off the ground. They do not resemble carpenter ants or termite and i think they are much smaller (probably about half the size of an average fly). Does this sound normal and what would be my best course of action to get rid of or limit them. It's a pain in the ass because it's right by the door to my basement/plug dungeon and the likelihood of having at least a few of them ending up in my bestment is pretty good.

I guess I'm considering calling an exterminator but I might be over reacting.

I trapped one and will hopefully post a pic of it tonight.