This is fairly old; the original sketch was done in June 2006, as was the colouring. About a month ago I finished it, but I had to re-do the lines and fix up the colouring to go with the new lines.
If I ever get around to it, I'll make a character sheet for this species of dragon like I had planned to do when I first drew this.
You can also see this on dA, located here.