I should have made the wing material a little transparent, but now is too late for that:)
and a larger one
http://www.inf.ufsc.br/~csd/imagens/montanha23min33s1024.jpg
cool :o
I like it… but you should have made the wings transparent!!
The model is too dark, given the setting. Consider a flood light below the dragon to simulate light reflected off the clouds. Nontheless, it is an impressive model.
I rendering a lighter, whiter 
version as I write.
Changes
The angle
The pose - I found a “bad deformation” near the arm/wing area, and them I fixed, but the movements are a little more limited, but not much.
I liked the new color better
I made the clouds less dense.
And I added a “finger”… “bone” or whatever on the middle of each wing.
Just a few more minutes and I’ll post.
EDIT:
HERE IT IS
Two things:
The ‘claw’ at the end of each ‘finger’ bone in the wing looks like a tent pole…not a claw.
The way the neck joins the body in that 2nd render, the dragon would suffocate itself when it lowered its head below its chest…looks unnatural.
Hope this helps,
Tal