Interesting critter
The first image had many challenges to overcome. The most important two were 1) too much background, and 2) uneven light. You either needed to be at a full 1:1 on your macro, or even beyond (if the fly was very small), in order to reduce the background a bit. Shooting in the middle of the day, or any time after the sun comes out, can create areas of blown highlights and other areas where it is a little dark. Had you framed the first image a little closer, and had even light, it would have turned out more intimate and interesting IMO. (Don't get me wrong, it's still interesting, I am just nitpicking since I am a macro junkie.)
Not sure what lens you used. To overcome harsh daylight sun, you could have tried a diffuser shade--but those can scare-away active flies (as can your own shadow). Shooting either early morning, or evening (when it's still light out but the sun has gone), or when it's overcast, is the way I ensure even light which is critical for macro shots.
The second image has very good focus and nice color. A good dorsal ID shot for sure.
Love macro--and hope you find this constructive!
