EDIT: Male and female parrots do it. I'm not certain why such a young parrot would be doing it. However both of these pages:
http://www.birdchannel.com/bird-words/r ... ation.aspx http://www.parrotchronicles.com/behavio ... havior.htmindicates that generally adults do it but even young parrots will too. It sounds like she's regurgitating to me but the following I found online gives a nice detailed description of regurgitation and vomiting so maybe just check.
"A parrot regurgitates usually for one of two reasons: he is ill or he likes you. One way to tell the difference is by observing the action of the bird's head. If he whips it from side to side, he probably is vomiting because he is sick. If the bird makes a bobbing or pumping movement, most likely he is offering food to a mate or person with whom he has bonded.
However, just to complicate things, a sick bird also can make the bobbing movement, and a lovesick bird may whip his head to dislodge food. Unless you're certain your parrot's regurgitation is aimed at you, it's best to let an avian veterinarian decide whether he is sick, especially if you've found food in the cage that was vomited during the night. With any luck, an upset tummy from some ill-advised tidbit of food will be to blame.
Regurgitation as courtship is what seems to be going on in each case here. As unpleasant as it seems to us, regurgitating food is perfectly natural for a parrot following its hard-wired urges. Here's what happens.
Most parrots kept as companion animals are hatched in captivity and raised by hand. This close association with humans allows the birds to imprint on humans. Imprinting is a form of early learning that results in the bird identifying with a particular species.
When humans imprint a parrot, the bird grows up almost thinking it is human. This confusion often results in a parrot pursuing a human as its mate when it reaches breeding age. And a lot of breeding revolves around regurgitation.
Parrot couples exchange food via regurgitation as part of the courtship ritual before breeding. It is even rehearsed by pre-breeding age birds once they have formed bonds. "