Hi jose, Great shot, but not simple at all... The perfect reflection, breaking the mirror image by the soft ripples in the water absolutely add to this photo. The combination of the pastel tones in the water with the bright, saturated legs of the bird, as well as the textures and contrasts in the feathers are spot on, maybe a bit more details in the black parts, but that's only minor. Very good shot!
I'm guessing you posted the full size image, uncropped, looking at the image aspects. Maybe a small crop on the right and bottom could be in order to create a bit more balance. The margin on top is smaller than on the bottom, which is IMHO, not the best of choices. Besides, a bit of negative space on the left could create a bit more impact.