Sudden behavioral changes in my Green Cheeked Amazon
My Green Cheeked Amazon (Mexican Red-Headed Amazon) recently terrified me by acting bizarrely, suddenly out of character. He was sitting calmly on the perch I have for him in my room when he seemed to become startled. He jumped up and began flying in a disoriented way through the room, running into things and yet continuing to try and make it back to his perch. He's not usually so uncoordinated, and there was nothing in the room to spook him; he did this for seemingly no reason.
He worked himself into such a frenzy that he got himself backed into a corner, behind my nightstand. Here he began to flail almost uncontrollably, screaming and squawking like there was something attacking him. When I tried to reach him in order to calm him down, he ran under my bad, wings drooping, and began to hiss at me every time I drew near. He was acting like he had never seen me before, and like he had no idea who I was or where he was. He treated me like a predator rather than a familiar face. A few moments later, however, when I finally got him to come out from under my bed, he seemed perfectly normal once again.
I have had my parrot for at least 6 or 7 years now, and not once has he EVER acted this way, and with no warning. It really scared me, and I need to know if this was just him being startled by something... or something much more serious. He seems perfectly fine now, but I didn't want to take any chances so I came here. Any help or advice on this bizarre situation would be greatly appreciated.