The immediate foreground, between the camera and the path is open landscaping with no enclosure and no animals. The far right is the walk-in aviary which has a surprisingly large number of species. The exhibit across the path I believe has sifaka (and perhaps a second lemur species).
@ThylacineAlive I photographed the i.d. signs but was not going to take the time to copy them all down. However since you asked I have now typed them out and posted them under the photo of the aviary itself, which you can find here: Africa Rocks aviary | ZooChat