Peanutbutter is about a year and a half old and if he is sitting on my knee and I make hand gestures while talking he will start bobbing his head up and down with his beak open and make chattering noises as well as say his name to the beat of the hand motions. He does this even if he is on me and my boyfriend is making hand gestures while talking or vice versa. Anyone know what this behavior is? I've tried looking it up but haven't found anything.