Stupid Fly

Working downstairs in the rumpus room I was irritated with a fly buzzing around and bashing itself on the various windows. I've always been curious in the way that flies seem unable to extricate themselves from a house whereas bees seem much better. I opened a window, as you can see to the left and the fly was still unable to make its way through the gap. In fact it came back in to the house and made several attempts to leave the building before finally succeeding. I'm not sure who was more frustrated ... the fly or me!