The first one is, I bought my IRN from a pet shop and I don't know how old he is. (The shop didn't know either.) How can I tell, or where can I find out?
Number 2, as my Birdy (thats his name - original, hey!!

Number 3 is, when my IRN is in the couch with me, sometimes he walks over to me with his head down, shoulders slightly out and forward and makes a soft whistle/gurgling sound. I was wondering what this means.
I've had him for nearly 5 months now and he's an angel. He is wolf-whistling, and I'm trying to teach him to say hello.