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Hey there everyone, Im writing to get some advice.
I have a new GCC we got her yesturday from a 15yr old who lost interest in her. She is a little over a year and in the 24 hr since shes been here its like night and day compared to my IRN. She,(assumed as shes unsexed we really dont know, this behavior could indicate shes a he) bonded to me immidiatly and has been sweet as pie. My bf was handeling her and though she prefered me allowed him to stroke her and even gave him kisses. Well today my kids came home from the weekend with there dad and all hell brooke loose. She became so possesive of me. It started when my eldest,(9yrs) held her, she bit his ear like a pit bull and held on! we got her off consolled him that shes still learning and well take it slower next time. Shortly after she was on my lap and the boys came in,(youngest 4.5 yrs), well she went nuts and started chasing them away. even when my bf who was friends with her this morning attempted to pet her she bit him. he soothed her and did pet her telling me he thought shes trying to protect me. Well just now she was chasing my youngest son and when I put her down off me to show her it was unexceptable she bit the hell outta my wrist. In her cage she went with a harsh no. Now after her punishment ive opened her cage but havent held her yet. Im wondering how you guys would recomend handeling this. I've had 2 birds in the past that became possesive of me and I tried to stop them but it got so bad I ended up having to rehome them as they became soooo agressive, 1 toward my kids, he is still a one person bird i get regular updates and the second even would attack me at the end very viciously. I refuse to do it again and I wanna nip it in the bud NOW before its a learned behavior. SHe was never a biter befor according to the girls mom but she was nippy in her cage, (cage teritorial), what should I do I already LOVE this bird and I really want my kids to have a possitive experiance with her. I also wanna know why my birds think Im there mate and feel the need to hate all others. My IRN is very much a looner and tolerates some handeling,(with out biting) but would rather watch from a perch. So he doesnt behave this way. Any helpfull advice is welcome.
Thanks, Candice
p.s. please excuse any and all spelling errors, (how do we spell check here?)

You might find some of the links below to be helpful.

Sex And The Psittacine
How Not to be a Tease
Sexual Behavior in Parrots


Also, you should look into possitive reinforcement or clicker training. It's not so much about the flashy and "cool tricks" your birds could learn but more about being able to better communicate with them and what you want from them. We often do training in dogs, but hardly any training in birds, beyond step up. "Don't Shoot The Dog" is a great introductory book into what it is and how it works. There are also many other great resources for possitive reinforcement and clicker training!