Of the birds I have done so far, this one is the most like a classic naturalist illustration or bird guide. In some ways that's good, and in some ways that's bad.
I think it comes down to that distinction between pure art and purposeful art. Scientific art is purposeful. It becomes illustrative because it's trying to teach someone something. Therefore, it loses the honor of being "art for art's sake." In many circles, purposeful art is a thing to be disdained. I disagree.
I make these birds so that I can learn about them. I'm not trying to be the next Audobon. I'm just selfishly learning everything I can about bird structure. So that's my excuse.