Whenever the pair is ready. That's not a wild bird, but a captive and they don't know seasons as they are never exposed to them. Good for you to have one of these little "feathered Dragons". LOL, mine's a natural green. That blue mutation costs quite a bit more in Canada (1400 dollars) versus 900 for the green. I can't resist, here's a pic of my guy. Edit: Kali, what he's doing, hand wise, is what many Quakers will do as Juveniles. I'm betting he's 3 years old or less. As for the attacks, get used to it. They are an extremely territorial bird. My guy has an area on his cage top, that I won't go near. That's his space and he'll charge if it's violated, even by me. Find neutral ground and let him come to you. He will nicely. They will aslo defend you against others. Don't forget, you happen to be his bond mate and also his territory. When I mentioned "feathered dragons" earlier, that's what I was referring to. There's a lot of bird in that little body and they actually require quite a bit of understanding of their psyche and moods. It's not hard for them to flip from being little cuddle monsters to terrors in an instant.Often they don't even need a good reason, other than it might be fun to do. You'll get to understand his body language and what certain noises mean, with time and learn to differentiate between real and mock anger. There's actually an excellent book on them, by Mattie Sue Athan, called Guide To The Quaker Parrot, published by Barron's (ISBN 0-7641-0176-5) that has everything an owner needs and I highly reccomend it. Chapters 3 & 4 deal with the issues you're mentioning. Another excellent resource is http://www.quakerparrots.com/ . I've been a member of that site's forum for about 3 years. They have a number of avian specialists, that are particularly knolegable of Quakers that freely offer advice and little gems of info, from current training tricks (behaviour and talking) to medical. They can be a handful, but with proper socialization,changing his toys and their location frequently and taking him for a walkabout in the house (if he's clipped), you can curb his agressiveness a bit. They like variety. You need to keep their minds going. My guy (Trouble), goes on bicycle jaunts with me, to the local Pub once a week. I often don't get him back until it's time to go home. I don't recommend this approach with everone, but I know the bird and he's bonded to the extent, that I don't have to go looking for him, he comes to me in a crowd, when he's had enough. He's only partially clipped, just in case a predator manages to sneak up.