Season......A little more dof for me or the focus point a bit closer, the line of snow leads your eyes through the shot quite well.
Gravity....Nice idea and great you have shown how you've done it.
Wild........Great timing and the light on the feathers looks good. I would probably have preferred the setting sun behind me, to get all the bird in that lovely golden light. I like the second one a little better as it shows the warm light more.
Space.......I like the first shot, I would have probably removed one of the off centre birds to show a space in the line.