Baby atiel, Concerning Behaviors?

The bald spots are normal for atiels, the one behind their heads appear more in lutinos (all yellow birds) and their preen gland is located just above their tail feathers. They'll use it to waterproof their feathers with the oil from the gland. You should consider having her wings clipped, it sometimes makes them more docile and nice (gets rid of attitude) and will prevent her from running into a wall if she gets spooked. I had a friend whose atiel flew into the ceiling fan and got killed because they didn't clip her wings. Give her some time without interaction. It usually takes up to 2 weeks for a bird to get used to it's new home. Don't touch her for a while. My female always hissed at me, and nipped, but wasn't trying to hurt me or she would have done so.