Quote:
Originally Posted by W.E.B. Du Bois
You keep his "wings clipped?" Please do not tell me that means you cut parts of his wings off. 
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Usually that means cutting the primary feathers- It dosen't hurt, and they do grow back.
I haven't had a large parrot, myself, but we were taught a couple of guidelines for handling them. One is that it never works to yell 'NO' at them, like you might a dog- they like loud noise, and so yelling is actually positive reinforcement. Discipline is better provided by a 'time out' - putting the bird away and covering the cage. They also need to be kept below your head level- height equals prestige, so a bird kept or held up high will see itself as dominant to you. You may want to join the Amazon society, since there are many knowledgeable folks there who can answer questions about your breed.
amazonasociety.org - Content
And here are a couple of articles I found on parrot behavior:
Parrot Behavior; Yes, No And Maybe
The best little Hen House - Understanding Amazon Parrot Behaviour Article.