Nice work. Very creative. Photographically not strong for me, I'm thinking more impact would be had from a black background. What looks to be happening is that the white is reflecting 'fill' into all the cranes and flattening it
I like the cranes, not crazy about the overly bright white background. I'm curious how this would have looked with a black background. For me, this would have worked well in the bird challenge too.
My daughter is rather an expert in this art.... the dark blue crane needs some work on the bill. The colours came out well, but a raking light would have revealed more character in your photo, me thinks.