Parrots parrot parrots?
We really need to be aware of our own biases and biological limitations if we actually want to study and understand the ability of other animals to have complex communications. Birds experience reality differently than we do - they see more of visible spectrum, they can make multiple sounds at once, etc. I wouldn't be surprised that what they can hear and how they perceive things like time is very different then us. Anyone observing parrots, crows, and other highly social avians can see they have complex relationships.