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We've been playing around with a stinky protist, and wondering if it's stink served any purpose.

So we set out a rigged scent trap and got a single fly species investigating it. I live surrounded by farm land (animals) Franco-suisse border (Geneva-area). There are lots of types of flies in the area.

This species was smaller than a typical housefly and larger than a Drosophila. It looks a lot like a Muscoidea to us. My guess is that maybe it is some sort of Fannia sp. I had my friend snap some macrophotos. Sorry for the bacteria on the eyes. I was wondering if anyone maybe able to offer a more definitive ID.