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hello,
fly found on 17-05 at the banks of a creek....

I first thought of Delia... but after a closer look: in my opinion Delia is to "hairy"
what about Paregle audacula?

and because I would really not like to read this sentence again:

"I can’t see any specific characteristics, which could lead to a genera or species" ,

I will give you some 7 pictures :) edit: +2

many thanks for looking into this...Chris

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and last

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one more try, thanks ... Chris

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and one more :)

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It is a male Delia belonging to the penicillosa species group, all of which have long setae on one of the sternites, I can't tell which species it is without a view of the abdomen from below. Is the locality near the coast? In Britain penicillosa is found on sand dunes.

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thanks Michael for your answer
...and no, this fly was not seen in miles (150+km) from any sand dunes, but on wet grassland next to a creek in the east part of belgium, near german/dutch border..
Delia penicillosa is not listed in the Grootaert-species list for Belgium, as well it isn't on two other observation-sides......or is there a synonym name used in the Lowlands ? ..

but unfortunately I've got no other shots from the abdomen from below...but I will check for certainty tomorrow ..thanks again...Chris