The scientists believe that the parrots' apparent capacity for dance may be linked to another talent that they share with humans - the ability for vocal learning and vocal imitation.
They believe the part of the brain that evolved to allow us and a handful of other species, including dolphins, songbirds, elephants and some cetaceans, to learn and mimic different sounds may also be responsible for the ability to move in time to music.
"This is a capacity that everyone thought was uniquely human, but we've found evidence that some animals can keep a beat."-- Aniruddh Patel quoted in Birds show off their dance moves
"You see here a fundamental response to music seen in species that normally don't have a relationship to music in the world. [sic]
"They are clearly using a brain system that has a different day job, so to speak."