Excellent wing position and getting these little speed demons in flight. Sharpness looks pretty good. I really like the water coming off the back of the bird and gives the impression of speed.
I would raise the exposure as the bird and background seem under exposed to me. Also you have a halo around the birds wings. This typically happens if you sharpen the whole shot and don't select the bird separately. Also can happen if you apply a shadow and highlight adjustment to the whole shot and not to the bird separately. Not sure which it was but I would go back and change that part of your workflow. A couple minor tweaks will really help this shot.