I once knew a guy who made good money selling talking parakeets. He had a number of birds, but his myna was a prolific talker (he also imitated the phone and doorbell which could be annoying). Anyay this guy bought regular non-talking parakeets for ten bucks each (a long time ago) and put them in the room with the myna. Within a month they were all talking, imitating the myna. Then he would sell them for $25 each.
Heh, I knew a Chief in the Navy who had a defective Myna bird...
They tried to teach the bird to say “Merry Christmas”, but all it could ever say was “Merrreeeeeeeeee...” and it would just stop!
And it also had one other significant phrase that it could be counted on to say at least once when it wasn’t wanted: “Son of a bitching dog!”
I guess they teach each other how to behave. LOL