Why does my indian ringneck make all sorts of different noises?

sometimes she will whistle, then she will sound like a atiel and a lovebird and she tries to say hello alot but just come out as a little squueky noise, she makes a rumbling noise like shes growling, the other day she sounded like a baby magpie and then a lorikeet, where the hell does she pick up these different noises from?