The deaths of nine monkeys at a zoo in Hong Kong over a two-day period have led officials to close part of the facility while an investigation is conducted.
According to a statement from the Leisure and Cultural Services Department, which manages the zoo, eight monkeys were found dead on Sunday, with another dying on Monday. Among the deceased, three belonged to a critically endangered species.
Hong Kong's leader announced that toxicology tests and autopsies are being performed to determine the cause of death. He emphasized the need to contain the situation to prevent further incidents.
A clinical assistant professor at the University of Hong Kong's department of microbiology described the cluster of deaths as unusual for captive animals and suggested that the investigation may focus on potential infections or toxic agents.
The zoo, which is the oldest in Hong Kong, opened in 1871 and spans approximately 14 acres in the Mid-Levels district. Following the incidents, the zoo began monitoring all its animals and closed its mammals section for cleaning and disinfection.
An urgent interdepartmental meeting was convened by the government to address the situation. On Sunday, staff observed unusual movements and appetite in two additional monkeys, leading to their removal from enclosures. One of these monkeys died the following morning, while the other remains under observation.
The deceased monkeys included three cotton-top tamarins, classified as critically endangered, as well as four white-faced sakis, one De Brazza’s monkey, and one common squirrel monkey. The monkey currently under observation is also a De Brazza’s monkey.
The zoo houses a total of 158 birds, 93 mammals, and 21 reptiles.