Hello. I have a Cockatiel I recently got (December 15th 2011) and I was told that he and his brother were a year old and that they imitated sounds like "Hello Pretty Bird." I came to find that only his brother, who has the neon yellow face, does that. I named him Murphy because I thought he was a boy, but I'm confused now. He doesn't have a lot of yellow and he's not as social as his brother (Cooper) is. Here is a recent picture of him, which was in January. What do you think?