Parrots are teaching each other to talk !

I've heard birds like parrots are about as intelligent as a 4-5 year old child. It doesn't surprise me they would be able to teach other birds to make human sounds, it's just hilarious that they are doing so. I would have thought an escaped bird would want to revert to more wild behavior based on instinct, but I guess if they were raised with humans they would think it was normal. If I found a talking bird in my back yard I would probably want to take it in and see if it belonged to anyone though. It would be hard to know if the talking bird was a lost pet or a bird that learned from a list pet.