Four Sumatran-Bornean hybrid orangutans and two Bornean orangutans live at the Great Ape House and Think Tank. The orangutans can travel on an outdoor cable crossway across the zoo to the Think Tank building.
Batang is a female Bornean orangutan, and Kyle is a male Bornean. Bonnie and Lucy are hybrid females. Iris and Kiko are male hybrid orangutan.
Happy the Nile hippopotamus lives in the elephant House along with the zoo's Asian Elephant family, a pygmy hippopotamus, and capybara. The zoo's pygmy hippos are descended from a famous pygmy hippo named Billy, who was a pet of president Calvin Coolidge. Rhinoceros and Giraffe were once kept in this building, but the zoo moved them to another zoo to make room for its baby male Asian elephant, Kandula. On June 22, 2006, the zoo announced plans for a new $60 million state-of-the-art Asian elephant exhibit, called "Elephant Trails."
Features a nocturnal room for kiwis and a free-flight room for tropical birds. Outside walkways pass yards of larger birds, such as cassowaries, cranes, flamingos, and king vultures.