I think either a closer zoom or closer crop would have worked better. Being darker colored birds on pretty dark water they tend to be hidden.
The left tree leaves are a bit distracting. The coloring seems find for what colors are present but the lack of any detail overall hurts the image.
The framing to be is a bit off as well. The leaves on open side then the birds then the boulder. It does draw the viewers eye right across all of that in a diagonal line. But the birds get overlooked.
Black swans - beautiful birds. Unfortunately there is so much else in your image I can't see them very well. A closer crop would have really make this image work for me. As it is, all I see are two orange dots and a big gray thing. With some work, this could be an impressive image. Good luck int he challenge!
great shot, nice composition, I like how the image is framed with the leafs in upper left corner and the rock in lower right corner. the only thing that looks wrong is that grass green color of the water, looks like toxic waste.