If you have "Daz's Eagle" they also sell a animation file with the bird flying.  The bird is really nice, but I can't vouch for the animation file as I really don't know if I have it or not?  That's what happens when you have so much stuff you really don't remember if you have it or not? LOL!  I apologize but I work nights and really can't check right now....but I don't think I do?

Anyways, I hope this has been some help to you as I don't know what else to recommend.

Take care and good luck in your search.