In sunlight the fly had a nice color, so I thought it would make a nice photographic subject.
But on closer inspection, I discovered that no amount of cleaning was going to make this fly photogenic. What I had in hand was not a freshly dead fly, but rather the remains of somebody's meal. From the puncture wounds, I suspect a predatory fly, but I suppose it could have been a spider also.
Full frame:

Crops from the above, 70% of actual pixels:



Canon T1i camera with EL Nikkor 50 mm f/2.8 (newer model) at f/4-5.6 half-stop. Zerene Stacker PMax with post-sharpening.
--Rik