me after my 9th coffee
caique papa here!
they do the thing because they Like The Sound. caiques are extremely rhythmic birds, moreso than other parrots. although caiques are capable of hopping and dancing, they also go into sound-induced trances - where they either sway along to a noise or they repeatedly make a noise (as shown here). in a way, it’s a form of stimming.
tl;dr
bird like the sound; bird is ok
Bird is glitching