Jack was my first Jardine. My name is Rob, hence my username JackAndRob.
Unfortunately, Jack escaped shortly after he joined us and we never found him. Jack came from the Kings Heath Pet Centre, but I got Jessie directly from the breeder. Their personalities are different. In the shop Jack started playing with me within seconds. Jessie was a little timid at first, but I think that was because she came to me directly from the breeder's home. Once she had come to our home though, she soon became friendly with me and now we're pretty much inseparable.
In general Jardines are known for being friendly with all household members, but they usually form a closer relationship with one person. That's what we've found. As her 'primary carer' - I do most of the day to day things - provide her food, play with her, etc and she spends more time with me as I am in the house all day but she will happily go to my wife too, especially if she thinks a favourite food or treat is available. In the first few days of a bird being introduced to a new environment , it helps if they have someone to focus on and then they will naturally form friendships with other people given time.
Male and female Jardines are physically identical. The only way to confirm the sex of young Jardines is to have a DNA test done. Sexually mature females can lay eggs, even if they have had no contact with others, but that's true of most if not all parrots. You will have seen images of adult Jardines with red and orange plumage on their heads, wings and legs. Juveniles typically have brown plumage in those areas, but once they go into their 2nd moult at 9-10 months, the new colours start to appear. It can take 2-3 years for most of the colours to come through. Jessie's reds have steadily grown in the last 3-4 months.
Placing the cage in the most active room in the house is usually recommended. When you form a close relationship with a bird, you become a member of the flock and they want to be where the rest of the flock hang out, in and out of the cage.
Jardines are vocal, but compared with many other birds they are generally not loud, even when alarmed. Most of the time Jessie whistles tunes that I have taught her, she says a few words and she mimics a few household noises including the sound of the phone ringing. She also sings when the washing machine finishes its cycle - it plays a tune and Jessie is learning that too! She and our Eclectus Frankie learn different sounds from each other as well.
Jessie can be quite boisterous when she plays with me and her toys. I encourage it, to keep her physically and mentally active. She will bite, but it is controlled and rarely painful. A bird's beak is used as a third foot or a hand, and it is natural for them to use it when clambering around.