REDI

On August 18, 2025, Gieke and Artemis—both candidates for the next release—had their medical check-ups. The results showed that Gieke, who is in the same group as Redi, tested positive for hepatitis B. To be safe, the medical team then tested all the orangutans.

The results revealed that, besides Gieke, two more orangutans were also positive: Redi, who shares the same enclosure with Gieke, and Seko, who was in a different enclosure. To prevent further transmission, all three were moved into a special isolation area, which has three separate rooms. Redi was placed in the room on the right side from the entrance.

Laboratory tests confirmed that the virus was not transmitted from humans, but rather from orangutan to orangutan. Interestingly, none of the three orangutans, including Redi, showed any clinical symptoms.

In isolation, the biosecurity measures were also upgraded. While staff previously only wore masks, boots, and used disinfectant footbaths, they now use full hazmat suits. A dedicated animal keeper is also assigned to the isolation block each day to minimize risks even further.

Even in isolation, Redi remains active and shows no signs of illness. He is often seen climbing around and playing in his cage. His appetite is also very good—he always finishes the food provided. Redi clearly prefers fruits over vegetables, always eating the fruits first before moving on to the veggies. Being alone in his cage also means he can eat more calmly, without worrying about other orangutans taking his food.

When it comes to interactions with humans, Redi shows little interest. He usually moves away when the keeper approaches. During feeding time, he simply takes his food and immediately moves back, without any further interaction.