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Photo#585040
Before frassing...what happened to this fly?

Before frassing...what happened to this fly?
Grand Forks, Grand Forks County, North Dakota, USA
October 6, 2011
Size: Length ~ 5-6 mm
I found three of these flies, all appearing to be the same (unknown) species, all dead, and exhibiting distented abdomens. All were affixed to some vertical substrate (this one on glass, and the other two on walls), and the proximal area around each fly was littered with a yellowish 'dust'. I've not observed this before, so I'm hoping that some one out there has. Is this evidence of parasitism? Thanks for any hints! ;-)

Moved
Moved from Flies.

Parasitism- by fungus
This isn't that uncommon, judging by the number of images posted. Charley Eiseman has collected them together here

 
Thanks, Chuck!
Very fascinating! I'll give more photographic attention to this phenomenon in the future!

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