Another place we visited in Pittsburgh was the National Aviary. Maureen and I highly recommend it. In the Aviary, you basically walk a loop inside the building. Some species you watch through glass. Information about the species' habitat, location, and diet, is posted on the wall. Then, there are large habitats that you walk through, where the birds fly freely around you.
Staff and volunteers did wonderful presentations in these large habitats. Some of the birds are trained to eat from your hand, or catch food tossed into the air. It was awesome. There was a presentation in one of the Habitats every half hour, and the presentations lasted about 20 minutes. So, you just walked from one presentation to another.
A number of children were visiting the same day we were there. It was fun to watch their faces when a tern swooped down and grabbed a wax worm from their fingers. The photo of me feeding the terns was unfortunately blurred. Here I am feeding a large pigeon. (I am sorry, I can't recall the species or where exactly it lives in Asia. Too many birds at one time. Now I know how beginners on our bird walks feel!) After attending all of the presentations, we strolled through the building again. Everyone else was attending a presentation in another part of the building, so we were able to sit quietly and watch (and listen to) the undisturbed birds. I wish I had taken my binoculars.
While the experience with the birds was awesome, I can't say enough good things about the staff and volunteers. It takes a lot of manpower to run this operation. People presenting. People caring for the birds. People preparing food for the birds. People cleaning cages. People training birds. People raising chicks (without imprinting) of rare species for release into the wild. Plus people in the hallways to answer questions. Each of them shared their passion for birds, and thus infected their audience. Maureen and I give this a big thumbs up.