Yes they do, really bad too! But Greys can be taught to be some really good talkers too.
Ray whistles now- he would screech initially in the morning when he heard I was up- but I play "The bright side of life" as sung in Monty Python's life of Brian each morning & would reward him... at first for not screeching, then for whistling.
So he is no more "squeaky bird". I'm trying to teach him to talk... if I can get him to sound as good as Scooby-doo I think I'll be lucky. By giving him stuff to do, and other ways to vocalize he's very easy to live with.![]()