These aviaries are part of the "Parrots of the World" section - a really nice collection including several rare species.
Ones that I remember from this past summer are Gang-Gang Cockatoo, Bourke's Parrot, Jardine's Parrot, Vasa Parrot, Pesquet's Parrot, White-Crowned Parrot, and several macaw, conure, caique and lory/lorikeet species (both in these aviaries and in other exhibits around the zoo grounds). The SA Zoo also has bird of paradise - at least two species that I remember.
