It's one of the ways they socialize: https://www.youtube.com/watch?v=Gds1qIV1oiEBut people who own parrots have been actively rewarding mimicking speech since probably the beginning. That's how you get parrots to say different things depending on what they want.
Except humans trained them to talk.
Don't they just naturally repeat sounds they hear in their environment?
It's one of the ways they socialize: https://www.youtube.com/watch?v=Gds1qIV1oiE
But people who own parrots have been actively rewarding mimicking speech since probably the beginning. That's how you get parrots to say different things depending on what they want.