Quote:
Originally Posted by newB
No idea where they are coming from, but I had about 20 (at least) fat black houseflies in the house today. If movies are to be believed, there's some serious supernatural shit about to go down in my living room. 
I keep a clean house, so I'm really curious where they are coming from. |
Quite possibly these guys:
http://en.wikipedia.org/wiki/Cluster_fly
They over-winter in attics, wall voids, etc. I had a huge infestation of them a few years back when I lived in the country in a brand new house.
Nothing to do with the cleanliness of the house either. They get in for the warmth in the fall then can't get back outside in the spring.