It looks like this fly has acquired some gold jewellery. It's called a noon fly; it lays eggs in cow dung, the larvae feed on other fly larvae within the dung. Gold doesn't necessarily stand for kindness and good taste, it seems.
Olympus Stylus 1s, 200mm, ISO200, f4, 1/200s
This is a repost of an older photo; my pool of new photos was reset to zero for technical reasons and is still regenerating.