I had to post here once more. During my last visit with Rocky (Opie), a bird trainer was working with some of the large birds up for adoption. One of the birds got upset or excited and started screaming, and finally the B&G joined in. He grabbed onto the front of his cage, spread his wings against the front of the cage, and screamed bloody murder at the top of his lungs! I've never in my life heard a bird put out that much sound. It was startling, but not off-putting if that makes sense. This went on for about one minute, and then everyone settled down, but that was my first introduction to the true Macaw scream!