The water looks nice, the ripples are realistic. The eye of the closest one seems to be a little too overpowering, maybe just darken the white to a gray? The eyelids of many animals usually hid the white of their eyes, so even just a dark brown with a black dot could do wonders. I think the wings are very well done, they have a sense of life to them. And lastly, what are they standing on?
Thanks Auro for the feedback. I'll work on the things you stated. The birds are standing on the shore (I guess). I painted it using a photograph taken by a friend.