I could share more comment on the visual aspect of the piece but i choose i would address the topic of design instead.Since i believe you missed direction in the design.She is like many thing at the same time.If i would have to describe her in my own word is would be a merfolk dyrad with some bird feather.
It not something really viable from a design stand point.Not in term of believable and easy to understand.Just remember that a creature evolve the way it is because of it environnement so it important that we can clearly identify from what type of environnement it come from.
I invite you to read my post here maybe you will understand what i mean.
http://crimsondaggers.com/forum/thread-6301.html
If you miss the point i try to explain.We cannot understand the nature of the creature we looking at is it flying?Is it swimming? Where can they be found?What the use of the feather of her face?Why is her skin blue-green.The more question you can answer clearly the better design will come out.