Stabilize subject

I would appreciate a stabilization effect, oriented on a single subject, like a bird or an animal.

Of course it’s not that easy. It should require a subject identification (contrast… color… I don’t know) to follow in order to keep it exacly in the middle of the screeen.

For example, current stabilization fails on every aspect if I try to follow an eagle in the total blue sky, and the high zoom required for getting the subject is influenced by body movements… My only way to keep it the middle is a frequent SIZE,ZOOM,ROTATE manual keyframe update for the clip.

Yeah. This should be amusing.
Best regards