Hi Horacio,
I like your image and composition. The details are sharp on your bug. For my taste, I would clone out that virtical white band in the background...:D
Another good one Horacio!! Good exposure, detail and composition. I love the colours in this image and the water droplets. Unfortunate about the light band running behind the subject.
Is really hard to control the BG with the critical DOF and trying to be parallel to the subject. Yes, we can use some BG as a green paper, etc, but this subjects often are very shy and you can't work too close to the insect.
I agree about the big round highlight (I try to fix it) I'm not shure about the white band in the BG... I think cloning this will be too artificial.... I like the detail and green/golden reflections on the fly body. I don't know which kind of fly is this; fly's lenght is about 10 mm.
Actually, I like the white band; it makes the details of the fly stand out. The abdomen would have looked worse against the darker background. It's possible the golds of the abdomen would look muddy against it. I agree that toning down or blending in the bright highlight will help.