When I asked for the better dancer between the bird and the baby, the bird won hands down, even beating out those who preferred staring at Beyoncé. It turns out there are several versions of the bird dancing but the one below is supposed to be the original.
I am no judge of authenticity of these things. I half wondered if it might not be a bird making some move just once and having it looped over and over seamlessly, but the subtle camera moves would actually make that hard. Also, in this version of the bird dancing to Ray Charles' version of Shake A Tail Feather, you can hear the bird squawking occasionally, so I'm going to put my money down and say this is the original real deal.