Distinctive Features

The pig-tailed macaque has a robust body, measuring around 45–60 centimetres in females and more than 70 centimetres in males. Adults weigh approximately 5–15 kilograms. Its most distinctive feature is its short, curved tail resembling that of a pig, giving rise to its common English name, pig-tailed macaque.

Its coat ranges from olive brown to dark grey, with lighter-coloured underparts. Its strong limbs support a largely terrestrial lifestyle, with the species spending more time on the ground than several other Macaca species.

Active, Intelligent and Social

The pig-tailed macaque is diurnal, meaning it is active during the day. It lives in groups consisting of males and females, typically numbering around 15–40 individuals.

Within the group, macaques display a range of social behaviours, including grooming, vocal communication, play and dominance interactions. Their ability to recognise individuals, understand visual cues and adjust their foraging behaviour demonstrates a high level of social intelligence.

A Varied Diet, Strong Adaptability

The pig-tailed macaque is an omnivore, with fruit forming one of its main food sources. It also feeds on seeds, young leaves, flowers, fungi, insects, small crustaceans, bird eggs and small vertebrates.

Its ability to utilise a wide range of food sources helps it adapt when food availability changes. In modified habitats, pig-tailed macaques may also feed on cultivated plants such as oil palm, bananas and root crops. This can increase interactions between the species and human communities.

Vulnerable and in Need of Protection

The International Union for Conservation of Nature (IUCN) classifies the pig-tailed macaque as Vulnerable. This status indicates that the species faces a risk of extinction in the wild if threats to its habitat and population are not properly managed.

Protecting the pig-tailed macaque also means protecting the habitat and ecological processes that sustain the forest.

Dispersing Seeds, Sustaining Forests

As a fruit-eating species, the pig-tailed macaque plays a role in seed dispersal. Seeds carried through feeding and movement can be deposited in different areas, supporting the natural regeneration of vegetation. This role highlights how every species contributes to a functioning ecosystem. The pig-tailed macaque is not simply a forest inhabitant; it is part of the natural process that helps forests continue to grow and regenerate.

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Previously, Agincourt Resources had supported Lubuk Larangan in Hapesong Lama Village since 2024, with positive results. The first harvest, held in early 2025, generated income for the village treasury. However, plans for the next harvest at the end of 2025 were disrupted when a flash flood swept away most of the fish in the area.

Recognising the potential for restoration, the village committee and Agincourt Resources conducted an assessment of the river’s condition. The assessment indicated that the area remained suitable for redevelopment as a Lubuk Larangan.

As part of its support, Agincourt Resources restocked the area with 7,000 jurung fish fingerlings, a local fish species native to North Sumatra, along with fish feed. The release was attended by representatives of the sub-district and village governments, as well as local residents. Around 70 community members participated in the activity.

Agincourt Resources’ Community Relations Manager, Masdar Muda Hasibuan, said that the company remained committed to supporting the Community Empowerment and Development Programme (PPM), including biodiversity conservation and the protection of local species such as jurung fish.

He expressed hope that the community would continue to protect the jurung fish population and preserve the river environment and ecosystem, ensuring that the benefits of Lubuk Larangan could be sustained for generations to come.

This restoration effort marks a step towards reviving Lubuk Larangan while safeguarding the natural resources that have long been part of life in Hapesong Lama Village.

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The visit formed part of the series of activities commemorating World Orangutan Day 2026. In addition to visiting conservation facilities and areas, the activity provided an opportunity for FOKUS, Agincourt Resources and Yayasan Marsada Sahata Lestari to exchange experiences and perspectives on strengthening efforts to conserve the Tapanuli orangutan (Pongo tapanuliensis) and biodiversity in North Sumatra.

The programme began with remarks from General Manager Operations Wira Dharma Putra. The visit continued with a tour of the nursery area, Tailing Storage Facility (TSF), and the operational area of the Martabe Gold Mine viewed from the Lookout.

Together with the team, the FOKUS delegation then proceeded to the Batang Toru Research Station and explored the preservation area managed by Agincourt Resources. At the site, participants observed first-hand the research facilities established by Agincourt Resources in collaboration with Yayasan Marsada Sahata Lestari as part of its support for research and conservation activities for the Tapanuli orangutan.

The programme concluded with a discussion between FOKUS, Agincourt Resources and Yayasan Marsada Sahata Lestari. The forum provided an opportunity to exchange views, experiences and input on strengthening conservation initiatives and biodiversity management in the Batang Toru Forest Ecosystem.

FOKUS Chair Julius Paolo Siregar said that the Batang Toru Research Station represents a tangible expression of Agincourt Resources’ commitment to Tapanuli orangutan conservation. He noted that the facility demonstrates concrete support for research and conservation activities in Batang Toru.

He also stated that future conservation efforts should be developed by considering broader needs and targets. A landscape-based approach is considered important to ensure that conservation efforts do not focus solely on a single habitat or species, but also take into account the interconnectedness of the ecosystem as a whole.

In this context, private-sector involvement plays an important role in expanding awareness and support for the sustainability of surrounding ecosystems. A similar view was expressed by FOKUS Observer Group Coordinator Khairul Azmi. Having seen first-hand the various forms of support provided by Agincourt Resources for orangutan conservation and biodiversity around its operational area, he expressed hope that the Batang Toru Research Station could develop into a pilot project for other companies in North Sumatra.

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One of the primates contributing to this biodiversity is the Sumatran Surili (Presbytis sumatrana), an arboreal primate endemic to the island of Sumatra. The presence of this species is an important indicator of a healthy forest ecosystem, making ongoing monitoring and habitat protection essential to its conservation.

These efforts are supported by the management of a research station that serves as a centre for research, education and wildlife monitoring activities. Together with researchers and relevant stakeholders, Agincourt Resources collects data on the presence, distribution, behaviour and habitat conditions of primates. The data gathered provides an important basis for understanding changes in populations and habitats, while supporting the development of conservation measures that respond to conditions on the ground.

Presbytis sumatrana belongs to the Cercopithecidae family. It has a slender body, a long tail and predominantly dark grey to blackish fur, with lighter colouring on the underside. The Sumatran Surili generally inhabits lowland to hill rainforests, particularly forest areas with well-developed canopy structures.

As a diurnal and arboreal species, the Sumatran Surili is mainly active during the day and spends most of its time in trees. Its movements are generally calm and cautious, using small to medium-sized branches in the middle and upper levels of the canopy. The species typically lives in small groups consisting of one adult male, several females and their young.

In terms of diet, the Sumatran Surili primarily feeds on plant material available within its habitat, including leaves, shoots, fruits and flowers. The availability of these food sources is closely influenced by the condition and structure of forest vegetation, making healthy and well-maintained habitats essential to the species’ survival.

According to the IUCN Red List, the Sumatran Surili is classified as Endangered. The species faces threats primarily associated with habitat loss and fragmentation, changes in forest land use, and other pressures on wildlife populations.

For this reason, conservation efforts extend beyond monitoring the animals themselves to gaining a comprehensive understanding of their habitat. Regular data collection enables the evaluation of population changes, movement patterns, habitat availability and potential threats that may affect the survival of primates.

Through long-term monitoring and collaboration with researchers, Agincourt Resources continues to strengthen biodiversity management in the Martabe Gold Mine area. This approach forms part of the company’s efforts to ensure that the Sumatran Surili and other wildlife species continue to play their role in maintaining ecosystem balance. For Agincourt Resources, protecting biodiversity is part of protecting what matters ensuring that operational activities go hand in hand with environmental protection and the long-term sustainability of the surrounding ecosystem.

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The book was developed to introduce the biological richness of the area surrounding the Martabe Gold Mine, covering a wide range of flora and fauna species as well as herbarium specimens that form part of the Batang Toru Forest Ecosystem. Its presence is expected to broaden knowledge, particularly among students, while fostering greater awareness of the importance of preserving the ecosystems around them.

Superintendent Community Services of Agincourt Resources, Yayan Nuryawan, said that the Batang Toru Forest Ecosystem is a gift to Indonesia, particularly to the communities living within and around the area. The forest is not only a habitat for diverse living organisms but also provides a range of benefits that sustain life. Therefore, efforts to introduce and preserve the forest’s natural wealth need to be carried out continuously.

Echoing this view, representatives of the South Tapanuli Regency Regional Environmental Agency (DLHD) noted that Agincourt Resources’ commitment to environmental conservation is reflected in its various studies of flora, fauna and herbarium specimens. Collaboration between the company, government and communities is considered essential to broaden knowledge and foster greater appreciation of the natural wealth found in the surroundings of everyday life.

Manager Biodiversity & Environmental Strategic Development of Agincourt Resources, Syaiful Anwar, explained that the development of the book forms part of a long-term effort to support biodiversity conservation in the Batang Toru Forest Ecosystem. Through its Biodiversity & Environmental Strategic Development programme, Agincourt Resources documents various flora and fauna species, as well as herbarium specimens, to introduce the area’s biological richness to a wider audience.

The activity was attended by 110 participants, comprising 25 school principals and teachers, 75 students, two DLHD representatives and eight Agincourt Resources representatives. The participants came from nine junior and senior secondary schools and their equivalents in Batang Toru and Muara Batang Toru Districts: SMPN 1 Batang Toru, SMPN 2 Batang Toru, MTsN 3 Tapanuli Selatan–Telo, SMAN 1 Batang Toru, SMKN 1 Batang Toru, MAS NU Napa, SMPN 1 Muara Batang Toru, SMPN 2 Muara Batang Toru, and MTsN 3 Tapanuli Selatan–Muara Ampolu.

Through this book, the forest is introduced not merely as a habitat for flora and fauna, but also as a shared natural heritage to be understood, valued and protected together.

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On 20 August 2026, the Basic Mechanic Course (BMC) Batch 2 officially concluded through a hybrid event, held online via Zoom and in person at the UT School Jakarta Office. The event was attended by Agincourt Resources Community Services Superintendent Yayan Nurywan, together with his team, representatives of UT School, and the participants.

Over approximately 12 months, the participants completed three stages of learning: Bintalsik for half a month, Incass Training for 3.5 months, and On-the-Job Training (OJT) for eight months. The programme was designed to equip participants with fundamental knowledge and hands-on experience in heavy equipment maintenance.

For Agincourt Resources, the programme forms part of its efforts to strengthen the capacity of local human resources in South Tapanuli Regency, particularly in Batang Toru and Muara Batang Toru Districts. The skills gained are expected to strengthen participants’ readiness while opening up broader opportunities for them to enter the workforce.

BMC Batch 2 follows the successful implementation of BMC Batch 1 in 2025, which was attended by 11 participants. All Batch 1 participants are reported to have secured employment after completing the training.

However, the journey to becoming a mechanic goes beyond technical skills. A willingness to keep learning, uphold professional ethics, and work professionally are equally important foundations for building a career.

This message was conveyed by UT School President Director Hamdan Aziz in his remarks. He emphasised that BMC is a foundational training programme in heavy equipment maintenance. Therefore, participants are encouraged to continue developing their capabilities and deepening their expertise after completing the programme.

One of the BMC Batch 2 participants, Bona Permana Siregar, expressed his gratitude for the opportunity to join the programme after successfully going through the selection process. For him, the experience gained throughout the training has provided valuable preparation for taking the next step.

Together with his fellow participants, Bona also expressed his commitment to upholding the good name of himself, Agincourt Resources, and UT School, while maintaining a professional attitude in the workplace.

The training may have come to an end, but learning never does. From Batang Toru and Muara Batang Toru, the BMC Batch 2 participants now take their next steps, carrying with them skills, experience, and the determination to keep growing and build a brighter future.

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The silvery lutung is easily recognised by its dark brown or black fur with grey tips, giving it a distinctive silvery appearance. As an arboreal species, it rarely leaves the trees. Silvery lutungs live in groups of around 9–40 individuals and may travel up to 500 metres through the forest during the day. Interestingly, adult females within the group share responsibility for caring for their young.

 The silvery lutung’s survival is also closely linked to forest vegetation. It is primarily a leaf-eater, with leaves making up the largest proportion of its diet, although it also consumes fruit, seeds, and flowers. When sharing its habitat with other primate species, the silvery lutung is more commonly found in the middle canopy of the forest.

In the wild, the species faces a range of challenges. The silvery lutung is classified as Vulnerable on the IUCN Red List, listed in Appendix II of CITES, and protected under Indonesia’s Ministry of Environment and Forestry Regulation No. 106 of 2018. Its habitat is threatened by logging and the development of oil palm plantations, while hunting and capture for the pet trade pose additional threats to its survival.

Protecting forest habitats means preserving the space silvery lutungs need to find shelter, forage, and thrive. When the canopy remains protected, the life that depends on it has a greater chance to endure.

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The five monitoring points provide an overview of water conditions at different stages, ranging from the final settling pond and the outlet prior to discharge, to the discharge point into the Batang Toru River. Monitoring is also conducted upstream and downstream of the river to assess water conditions around the discharge area.

The activity involved an Integrated Team comprising representatives from the local government, academia and the community. The involvement of these various stakeholders strengthens the monitoring process while providing an opportunity for stakeholders to directly observe how water quality is monitored at each point.

Samples collected from each location were subsequently analysed by an independent laboratory. The test results provide objective and measurable data on water quality, while also supporting the provision of reliable and accountable environmental information.

Before being discharged into the Batang Toru River, process water undergoes several treatment stages, including sedimentation, adjustment of acidity levels or potential of Hydrogen (pH), and testing of various water quality parameters. These stages are carried out to ensure that the discharged water meets the applicable quality standards and regulatory requirements.

Monitoring does not stop at the treatment stage. Agincourt Resources’ technical team conducts regular monitoring, with relevant authorities also involved in oversight. This ensures that water conditions continue to be monitored consistently as part of sustainable environmental management.

Through well-planned treatment processes, measurable data, independent laboratory testing and the involvement of various stakeholders, Agincourt Resources continues to strengthen responsible and transparent water management. More than simply ensuring that processes comply with applicable requirements, these efforts reflect a commitment to safeguarding the environment while providing open and accountable information to the community and stakeholders.

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The award-winning article showcases how the programme has continued to deliver tangible benefits to communities since its launch in 2011. In 2025, the initiative resumed with a target of providing cataract surgery for 1,400 eyes across five locations in North Sumatra, reflecting the Company’s ongoing commitment to expanding access to quality eye care, particularly for underserved communities. By the end of 2024, the programme had benefited 10,684 patients, with 12,173 cataract surgeries successfully performed, making it one of the Company’s flagship sustainability initiatives with a lasting social impact.

This award serves as recognition of Agincourt Resources’ ability to deliver communication that is not only informative, but also able to convey the values of sustainability through real stories that are close to the community. Through this approach, the company continues to strengthen its reputation as a mining company that prioritises transparency, care and sustainability in every contribution it makes to the community.

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The award was presented during the 50th PRSU Closing Ceremony, held on 2 August 2026 at the Tapian Daya Complex in Medan. The event was attended by Vice Governor of North Sumatra H. Surya, B.Sc., regional leaders from across North Sumatra, representatives of regional legislative councils, partners, sponsors, and other stakeholders. Supervisor Campaign and Event Management of Agincourt Resources Gio Armansyah represented the Company in receiving the award in recognition of Agincourt Resources’ contribution as a sponsor and its active support for the successful implementation of PRSU 2026.

The recognition reflects Agincourt Resources’ commitment to supporting initiatives that promote regional potential, empower micro, small, and medium enterprises (MSMEs), preserve local arts and culture, and encourage the growth of North Sumatra’s creative economy. Guided by the spirit of collaboration, the Company remains committed to fostering meaningful partnerships that create lasting value for communities while contributing to sustainable regional development.

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