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Hello!

I find these small (5-7 mm) black flies every year in late spring here in Ostwestfalen at the forests edge. There are zillions of them sitting on every leaf - and on every available part of my skin, especially when I try to concentrate on a photo ;-). They are harmless, but sometimes quite annoying. I would like to know what they are: Muscids or some other family? Thanks in advance!