My bird's scream song. It's similar to this but with a lot more screaming mixed in with his singing.
He also has angry death metal chorus were he just does this for a while and then go back to his scream singing.
If I'm lucky my dad will start playing the drums in the basement and the bird will hear and try to join in with his own little set of drums (or his food dish) cause he likes trying to keep to the beat of music.