Surabaya Zoo performed on the animals found plastic and wood inside the animals. The death of Melani the tiger, one of only a few hundred Sumatran tigers left in the world, outraged animal activists when it was discovered that the tiger was suffering from extreme digestive disorders before being rescued from the zoo. On 28 January 2014 Surabaya Zoo authority announced that the zoo has a collection of 3,459 animals from 197 species, but 81 animals are sick, disabled, and old, and 44 of which are in severe conditions. An online petition that calls for the closure of Surabaya Zoo due to
Jinan Zoo year. Employees at the zoo have contributed in many types of great achievements such as the knowledge of animal science, animal protection and animal breeding research. Valuable species originated from China include: giant panda, golden monkey, Asian elephant, takin, kiang, Thorold's deer, hoolock gibbon, Francois' leaf monkey, fox, red-crowned crane. In 1992, they introduced a pair of Sichun golden monkeys which they have successfully bred. Making Jinan zoo one of the few zoos that can successfully breed domesticate golden monkeys. In 1998, an area of 3000m was created for the hundred-bird paradise that contains over 150 different species of birds