This one's pretty noisy, and the focus is far from perfect, but I like the intensity of the colours. I didn't get many chances, as the fly flew off pretty quickly.
i really love this. the colors are almost surreal. the only thing i would change is to clone out the dark spot top right...it sorta competes with my attention to the fly.
Like you said, the fly flew away pretty fast, but this is nice even without perfect focus. I like the contrast of the green fly and the hot pink (I think) flower.