This is for the Anatomicae #25 - Birds of a Feather challenge over at CG Hub that I participated in. This is the anatomy of the bird I choose, the Bald Eagle, including skeleton and muscles.
Tedious, yet extremely fun to do and I learned a whole lot from it. That, to me, is the best part about it.
Anyways, here are my collection of references which I am showing for whatever reasons.
Well thank you very much, I am glad it could be of help to you. I wouldn't follow it exactly because I know it's probably full of errors. Be sure to look at actual scientific images of birds as well to get ultimate accuracy.
Funny thing is these were just made with an hatching style, it's interesting that such a simple rendering technique pushes the dimensions for you and probably everyone else.