I love aviaries, and big birds, but that's one I would skip for sure!! That seems like a really stupid idea. The one at Dallas Zoo got really pissed off at the sound of my camera shutter (old film camera, can't turn it off) and started posturing and trying to stick its face through the fence at me. Of all the animals I've photographed with that camera, including thousands of dogs, this was the first time an animal had ever done more than glance or look a bit startled at the sound so I wouldn't have expected that reaction.Since then I can never understand why they are sometimes kept in walk thru aviaries. And I am always a bit nervous when getting close by one...