Parrots are known for their ability to learn to “speak” , mimic voices , voice patterns. Some will learn almost anything and some will not learn nothing,no matter what you do. It all depends on the parrot.
In this video from Sertanópolis, Brazil, a green parrot sings and whistles along with Neno Alfenas as he plays on his guitar. They sing a medley of Brazilian songs including Natiruts’ “Liberdade Pra Dentro da Cabeça”.