LOLFly

I thought, until reviewing this picture, that what we had were mainly fungus gnats. This isn't a fungus gnat, though: it's some kind of smallish, fungus-eating fly. I know you're thinking, but, Mr_S, aren't fungus gnats smallish, fungus-eating flies? Well, yeah, actually. But it's different. This is some other, more housefly-looking species. I know it sounds like a pretty trivial distinction, but