Nice job on the shading and coloring, it looks nice. The dramatic shadow really works for positions like these.



However, there are a lot of issues with her upper body.



The pelvis and up is where the problems are: her chest needs to rotate with her arm pointing back, and necks can't flex that far (it looks like she got her neck snapped). Her slightly hidden wing is also placed in a strange position, and it doesn't really correlate with her body. Finally, the entire position itself; I'd define (by define, I have action lines in mind) whether she's going forwards, backwards, or standing on her tiptoe (kind of like after a dramatic throw), since I can't really tell which way she's going (or if the wind is blowing).



Keep it up, I'm pretty sure if you iron out some of the things I mentioned, you'd be even better than you already are. Good day to you!