Hi and welcome to the Amazon Forum.
If you have not yet read the first thread in the Amazon Forum (Amazon Body Language), please do so. It is near a gold standard for understanding and working with your Amazon.
As a group, Amazons 'can' get very accustom to their surroundings and if changes occur it can throw them off. The same is true for new arrivals, regardless of age. I am a big believer in 'The Real Estate Sales Tour' of our home. This process involves visiting nearly everything in each room of the home i.e. This is the Dad's favorite chair and this is the TV, etc, etc, etc... This may seem like a waste of time, but for whatever reason; a chair got moved or this or that got added to a room and they can become upset with a change, even if it is small. Hence, they could show fear! It also provides you or any member of the family time to bond with the Amazon. Remember, Amazons love to hear us talk to them or nearly everyone else. Our Amazon commonly joins in on telephone conversations.
IT IS VERY IMPORTANT to socialize and keep socializing your Amazon. In our home, nearly everyone that comes into our home gets to hold the parrot! One of our member's family have a game called: Pass the Birdie. The more Amazons interact with us humans and far more than just one person, the more open they are to new people and new things.
Always remember: Amazons Have More Fun! And, this is very true the more Socialized They Are!
Again, Welcome to the Amazon Forum! The Place Where Amazon's Rule!
Sorry, got a little off topic.