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Thank you for the suggestion Jan, I am no expert and had looked in a few familes but was still puzzled until I saw one similar in Drosophilidae.

I still couldn't get away from that family, so searched in google and found Drosophila hydei, a male and the halteres are not yellow but it does look very much like it.

http://www.biolib...e/id30536/

These are cultured for exotic pet food :o

http://www.dendro...hydei.html

What do you think? If we could say for sure that it is this we have no entries in the Gallery so would make a good addition. Looks good to me but as said, I'm not an expert. ;)