Apes consist of species of gibbons, siamangs, chimpanzees, gorillas, orangutans and humans. The exhibit provided new homes for the zoo's siamangs and pygmy marmosets. In 2003, she was noted to have a good interaction with a pair of siamangs. Separate exhibits include hamadryas baboons, lions, Siberian tigers, meerkats, alligators, and siamangs. Holds the zoo's gorillas, orangutans, and siamangs. The sounds used for the monkeys were actually those of chimpanzees and siamangs. Sumatran Orangutans and Bornean Orangutans, Western lowland gorillas, siamangs, and naked mole rats are exhibited. They are hunted for the illegal pet trade, with hunters preferring infant siamangs. This form of social monogamy has been observed in gibbons, siamangs, baboons, and macaques. This folktale is also known from the Malay Peninsula, where siamangs occur as well. Most siamangs on the market are infants, which often die during transportation. Siamangs are the largest of the gibbons and combine their songs with a swinging dance.