She is beginning to find what I call 'her place in the flock'. In my personal experience, this is something that doesn't happen a few months or even a year after we take an adult bird in, it takes a looooong time and I think (this is one of my 'off the wall' theories that have no scientific basis whatsoever and it's merely based on my experience and my 'gut feeling') it happens when they not only feel 100% comfortable in their new home but also when they get a sense of permanence in it... It's as if they said to themselves "Well, this is my home now, they treat me well and I am not going to lose it so I am going to make it MY own"
Now is when the tweaking and tweaking and tweaking begins, Wolf - welcome to my world!