I like the overall composition, choice of vertical crop was good. Like the "Y" formed by fly and stick. Like the color contrast with mostly neutral image and then the bright blue dragonfly. Good lighting (though the stick is just beinging to lose detail). Focus and DOF are great with fly fully in focal plane. The upper-left flare though is a bit much and distracting. Something should be there with the same line of angle but not that (IMHO). Not a fan of black backgrounds but here I think the delicate structure within the blue would get lost without it. I might have avoided cropping with the stick coming right out of the corner of the picture (maybe have moved it up a tad - this would move the dragonfly up too, its head might be a bit too close to bottom).