Hi Jon, nice control of the whites and I guess with that combo you may be a bit small in frame? Going more to the right may have cleared the leaves but the actual position of the subject may not have been that great after. A different crop perhaps, it's not quite working for me Jon sadly.
The slender profile of this fellow makes the image a bit difficult to handle I think. I would be inclined to crop the bird into the lower left of the frame and maybe have a look at a slightly darker blue for the BG and eliminating the vignetteing ( or maybe make it darker than the central area rather than lighter ? ) , but only after seeing how it looks this way after the crop.