are this parrots singing in diminished scale??

[Alan Celis]

So i was watching animal videos on youtube and i saw this one, and it strike me as odd how the parrots where singing it, so i wanted to ask someone here who knows alot of theory to kinda explain how they are singing, because to my ears it doesnt sound as they are in the mayor scale on both cucaracha and mcdonald, and it sounded to me like a diminished chord lol. I know its stupid but its kinda weird when you think of it.

or they could be singing just random note hahaha but its fun to overanalyze stuff sometimes, it can also work as a way to put the music theory to the test lol

 

[idssdi]

not sure how theyes are singing exactlyou but it’s really funny

 

[Syn Gates]

This is awesome! They are actually jazz geniuses they are modulating between A dom7(bird on right) and A minor7(bird on left).