of 34 years old on February 20, 2002. A portrait commemorating him can be found at the PPG Aquarium. The naming rights for PPG are set to expire at the end of 2023. Forest Passage Forest Passage (formerly Asian Forest) contains several species from Eastern and Southeast Asia, and simulates a journey from the Himalayas to Indonesia. This section features some of the most critically endangered big cats of Asia, including Siberian tigers and Amur leopards, as well as several other Asian animals, such as Komodo dragons and red pandas. This section, opened in 1983, is the result of the zoo's Master Plan of 1980, which was dedicated to create more naturalistic exhibits than what existed at the time. In January 2017, the Pittsburgh Zoo's only snow leopard, Chaney, died of cancer at 17. Since then, the zoo has displayed two Canada lynxes in the former snow leopard exhibit. In late 2018, several cubs were born to the pair, resulting in a larger family of Lynx. This change has prompted the zoo to rename Asian Forest to Forest Passage in light of the inclusion of a non-Asian animal. Tropical Forest The Tropical Forest, which opened in 1991, is a 0.5-acre indoor rainforest. This building focuses mostly on primates, containing 16 species in total. Ring-tailed lemurs, black-and-white ruffed lemurs, red ruffed lemurs, tufted capuchins, white-faced sakis, black howler monkeys, northern white-cheeked gibbons, Angola colobuses, blue monkeys, and great apes, including western lowland gorillas and Bornean orangutans all live in this building. Some other rainforest animals are displayed here as well, such as Hoffmann's two-toed sloths. African Savanna Like the Asian Forest, the African Savanna is also a result of the zoo's Master Plan of 1980. Completed in 1987, this section of the zoo is modeled to give the viewer the impression that he or she is walking along a river in an African savanna. This section of the zoo contains lions, African bush elephants, Masai giraffes, Grant's zebras, black rhinos, American flamingos, common ostriches, nyalas, dwarf crocodiles and Galápagos tortoises. Cheetah Valley is part of the African Savanna. It was originally housed a pack of African wild dogs, but they were removed because of the incident on November 4, 2012 in order to ensure the safety of the visitors. This exhibit now features cheetahs. Visitors can view them from a glass panel. The former observation platform was permanently replaced by tall