Well, the Hyacinths were naughty and got sent to the Zoo. I think when you have a pair of birds that beautiful (and expensive!), and were as much beloved as those Macaws were that you would make a better effort to keep them. They could have enclosed their area in aviary cloth, which is what they use on the tops of the two walk-through aviaries in the jungle trek and forest trail. They could have left the birds fully flighted and visitors could have seen them flying between several perches and acting more "normal" rather than just sitting in one spot for hours every day. It's normal that they would try to fly and move around. Their normal range would be hundreds of miles in any given day. It must be horribly frustrating for them to sit and be able to feel "free" and see the things that their brains tell them they should be able to get to, but they aren't supposed to. It is a beautiful setting by the falls, but for a bird that intelligent and that large, the perch they were provided just isn't enough.