She may start chewing up your magazines or the newspaper. That information dinged into my head and I got her a piece of soft wood to chew on. She started chewing on that piece, then another, then another. In the wild, as they reach maturity, they instinctively seek out appropriate locations for a nest usually cavities in trees or in palms. The tree cavities are usually older and the wood is somewhat decomposed or is soft.
Palms are soft inside anyway.
The bird enters the chosen cavity and begins to excavate it to suit her. From my observations of our Cabby, the cycles usually last about 2 weeks from onset through the peak and back down. The need to chew and to locate and defend a nest site will probably increase, peak and diminish following these cycles. Provide toys made of soft wood or palm easy to tear up even clean corks. Our birds like a toy called Jungle Joy.