Bali Zoo leads efforts to conserve one of Indonesia's rarest primates

Bali Zoo leads efforts to conserve one of Indonesia’s rarest primates

June 18, 2025

Attractions / Environment / Zoos /

Bali Zoo’s dedicated wildlife conservation efforts have led to the silvery gibbon (Hylobates moloch), endemic to Indonesia and classified as Endangered by the IUCN Red List, not only surviving but thriving.

This year marks the first birthday of Seruni, a healthy female silvery gibbon born at Bali Zoo in 2024. She is the offspring of Boris's sister. Boris, a male silvery gibbon born at the zoo in 2010, was successfully released into the wild at Situ Patengan, West Java, in 2019. After spending one year at a rehabilitation centre, Boris was deemed fit for release. The reintroduction was carried out in partnership with The Aspinall Foundation and Indonesian conservation authorities.

Emma Chandra, Public Relations at Bali Zoo shared "to have bred an endangered animal, released it into the wild, and now welcome the next generation of its extended family is an extraordinary achievement. It shows that our long-term commitment to conservation is working."

Bali Zoo's silvery gibbon family now spans three generations, beginning with parents Koko and Minul (both born in 2000), who raised Boris along with four other offspring including Paris, Syahrini, Cincin, and Dahlia. The arrival of Seruni, born to Boris's sister signals not only successful breeding but also a sustained effort to protect one of Indonesia's most endangered primates.

Over the past five years, Bali Zoo has recorded key breeding milestones, including:

One silvery gibbon, Seruni (born in 2024)
One male Sumatran orangutan (born in 2022)
Two male Sumatran elephants (born in 2022 and 2023)
Multiple births of Indonesia's endemic and exotic species from 2020 to 2025, including: Javan langur, Yellow-crested cockatoos, Papua wallabies, Timor deer and Spotted deer.

Since 2019, Bali Zoo supports the Chainsaw Buyback Program in collaboration with Yayasan ASRI. This initiative helps former illegal loggers transition to sustainable livelihoods while protecting vital forest habitats, particularly for orangutans.

Bali Zoo is home to over 600 animals and is dedicated to the conservation of Indonesia's endemic wildlife.

7th August 2019 - Bali Zoo successfully releases endangered Silvery Gibbon into the wild

27th February 2019 - Bali Zoo elephant experience attracts thousands of tourists

26th November 2018 - Bali Zoo Introduces a new Elephant Experience

9th May 2025 - Singapore’s Mandai Wildlife Reserve to open Asia’s inaugural ‘ZooSchool’ and forest-themed event space

30th April 2025 - Rescued critically endangered Fijian iguanas welcomed at San Diego Zoo

21st April 2025 - Monarto Safari Park and Adelaide Zoo deliver enrichment Easter treats

19th April 2025 - Taipei Zoo to mark World Tapir Day with themed events for guests

11th April 2025 - Australia Zoo achieves successful breeding of Komodo dragons

9th April 2025 - Greater Bilbies thrive at Taronga Western Plains Zoo

19th March 2025 - Taronga Zoo Sydney celebrates Asian Elephants with traditional Thai Ceremony

18th March 2025 - Giant Pandas settle into new habitat at Adelaide Zoo

12th March 2025 - Zoos SA partners with Variety SA to offer more inclusive and accessible experiences

11th March 2025 - Zoos Victoria achieves quality tourism sustainable accreditation across all four attractions

6th March 2025 - Australia Zoo offers refuge for wildlife as Cyclone Alfred prompts cancellation of Green Day’s Gold Coast concert

26th February 2025 - Taronga Western Plains Zoo celebrates first anniversary of Platypus HQ

7th February 2025 - Zoos SA goes green to mark international ‘Reverse the Red’ day

31st January 2025 - Relocated Perth Zoo elephant settles into new South Australian home

27th January 2025 - Perth Zoo elephant begins journey to Monarto Safari Park

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