Loooove this!! I adore the perspective regarding the neck and head! The general line of motion is awesome, the curvature of the body compared to the opposite curvature of the top of the waterfall shifts your eyes around the piece.
I do agree with other reviews on the landscape, it's a bit odd and doesn't flow as much as it could. I'd also like to see less detail or less sharpness in the water and landscape for a more dramatic effect of distance. Overall, I love it, well done!