No new guesses, to make things interesting I will make number 6 count but it has not been gueased yet.
Are you sure about the macaw? I was certain it was that hybrid and when you said it wasn't I did a little digging and found these:
http://www.zoochat.com/556/blue-gold-macaw-hybrid-282893/
http://www.zoochat.com/556/feb-2014-discovery-forest-hybrid-macaw-354288/
The later of which is your photo.
Unless, of course, Cincy has two hybrid macaws and the above is of a different one or you've since found out it's a different hybrid??
~Thylo