Birds can be like that! My best friend's Mom got a yellow headed amazon (Petey, how original!) and he loved her Mom and he loved me but he chased my best friend all over the house and bit the living hell out of her. She was terrified of him. He'd fly straight at her head. I think it was because she couldn't carry a tune. I think it pissed him off. She sang like a hyena in heat. :P
"Hi, I'm Macho!" that CRACKED me up!!