That was one of the ALEX unplanned discoveries.
(I hope I remember it the right way around)
One of the interns took Alex with her to the restroom (if you've got to go, you got to go, and it probably was pretty urgent) and put him (her?) in front of a mirror.
(they still wanted to do the 'recognise yourself in the mirror'-test, so Alex was kept far away from them till that point)
So that was one controlled test down the drain .... - but Alex immediately wanted to know "what colour" he/she was (it was that phase where Alex was learning to name colours).
(
https://en.wikipedia.org/wiki/Alex_(parrot) )
I get crazy reactions sometimes... Sunny was kind of obsessed with her image when she just arrived here and would steer me towards a mirror (by hanging / leaning in that direction) but nowadays she doesn't care at all.
She has probably seen what she wanted?
She would grab a finger (mine) lift it, bite down on it (thanks but no thanks!) a bit too hard, while looking at herself, almost to make sure that what she saw was what she felt (of the other way around) - is this real? It feels real ...
so what I see.... must be me!
But none of the parrots ever react to their own reflection like they would towards another bird - so they know!
.