They're gorgeous and the backdrop is striking but I think I would have concentrated on either the solo or the duo and gotten a little more of those reflections instead of stretching things out.
nice composition and perspective. there seems to be a bit of a green cast - some levels adjustments would have helped, or even just a swipe of the desaturation brush on the birds would have been enough.
A little dark, might be my display. I looks like the levels could have been adjusted slightly to enhance the white of the birds and still keep the darkness.
Portrait works well here vs. landscape. The bished are just a bit too dark, might try doing some adjustment to bring out some detail on them. I like the sharpness.