Get rid of these flies?
Every year about 2nd week of November we are inundated with these what I think is flies. They seem to like to hang out around where the downpipes go into the ground but only on the east side of the house. They also like the clothes line. If we leave the doors open they don't come in. It's just that to go outside you have to go through a wall of them. They seem to leave as quick as they come in early December. So 2 questions. 1 what are they and 2 how to deter or get rid of them. I have included a pic of them. Cheers