The lighter shade of blue in the middle makes for a nice compostion. I think I see some post-processing (sharpening) artifacts on the left that are a bit (quite minor) distracting. Amazing detail you've captured!
Great colors and detail on the wings, especially in the middle shot. I see a fair amount of haloing around the birds - this can be alleviated by applying the unsharp mask on a duplicate layer and changing the blending to Darken.