Interesting to note about that particular exhibit; that is where they housed the giant pandas that visited the zoo in 1988. It's been remodeled a bit, but if you look at it closely you can kind of see.
The zoo has over 350 species of birds, including more species of hornbills than any other zoo in North America. Southern sulawesi, black-casqued, wrinkled, red-knobbed, longtailed, white-headed, javan rhinoceros, great hornbill, etc. There are about 30 different species of hornbill at the zoo.