Charlie Parker Yes... Oliver will be alright eventually with you at the helm being ready to be the " pack leader!" The wing shaking, coming down to attack you certainly is putting you in your place. A big firm "NO", recognizing the signs of an attack before it happens, is very important. Returning to cage ( if you can!) Make it sooooo inviting in front of his cage. Playing games with you and family, any misbehavior, BACK to cage and door shut. Reading, singing, game playing in front of him routinely.... he can't resist!
Wrist status only has always been a must for me, others disagree, but I have done this with my rescue and all my birds. You EARN shoulder status!
I have never felt sorry for my rescue sunconure that attacked peoples jugulars and was out of forever homes. They only understand the " now", and thats what you focus on. Always be the leader and develop the relationship even if your new bird just watches if just off the door. If Oliver climbs down and is in " attack mode", intercept Nancy