That sounds interesting! I'm afraid of birds, so I'd probably just creep myself out! I think I need to look into a way to overcome that fear. And have you looked at information on power animals and "familiars"? Not sure if that's precisely what you were looking for, but I read about it recently and found it interesting.
Shapeshifting isn't possible physically however shamans shapeshift, spiritually, into animals frequently especially on journeys' and vision quests. I am curious though what exactly you are trying to do, more specifically anyway; if perhaps you can explain your intentions and expectations we may be able to better help point you in the right direction.