McDonna

I have a cockatiel. It spent its first years of its life as King but we changed its name to McDonna (yes, that's McDonalds + Madonna) when we discovered it was female after putting it in a cage with a male. McDonna's plumage should have tipped me off but I was relatively new to the game at that time. She must be 15 or 16 years old by now. The male she lived with, Romeo, has recently died. He was a bit of a controller. Whenever she left the cage to explore he would sqwauk and raise a ruccous until she returned. Romeo also left a lasting impression on her by plucking the feathers from atop her head. He seemed to be very high strung and easily frightened. Much more vocal than McDonna, though. It was barely distinguishable but definite when it would say our dog's name. Romeo would also bark like the dog. Most often, though, it would whistle in a long rambling way.
Link to wikipedia on cockatiels.