Collaborative Conservation Action and Reassessment of the Javan Endemic Damselfly (Rhinagrion Tricolor) in Nusakambangan

17 Jan 2026 Nusakambangan Island, Cilacap, Indonesia, Asia Biodiversity | Habitats | Invertebrates

Hening Triandika Rachman


Other projects

27 May 2020

Preserving the Last Remaining Populations of Javan Endemic Damselfly (Rhinagrion tricolor) in Nusakambangan Island

This project is the second phase of an ongoing conservation initiative focused on Rhinagrion tricolor, a forest-dependent damselfly associated with shaded stream habitats in intact primary forests. Building on earlier findings, the project aims to translate research into conservation action while updating population data and strengthening long-term conservation tools.

Initial coordination with PT Solusi Bangun Indonesia regarding the planned research on Rhinagrion tricolor within the Mining Business Permit (IUP) area. We were granted access to a highly restricted site that was previously inaccessible. © Prajawan K.W

Initial coordination with PT Solusi Bangun Indonesia regarding the planned research on Rhinagrion tricolor within the Mining Business Permit (IUP) area. We were granted access to a highly restricted site that was previously inaccessible. © Prajawan K.W

The project has three main objectives. First, it will implement conservation actions by organising discussions with key stakeholders, including government agencies, researchers, conservation practitioners, the private sector, and local communities, to identify threats and develop practical action plans for habitat protection. Second, the project will conduct a reassessment of Rhinagrion tricolor populations on Nusakambangan Island and potential sites on the Java mainland to update distribution data and identify priority conservation areas. Third, a field guide, Dragonflies of Nusakambangan Island, will be developed as a long-term educational and conservation resource.

Coordination with the Natural Resources Conservation Agency (BKSDA) RKW Cilacap regarding the activity plan, including support for survey team members and vehicle loans. © Prajawan K.W

Coordination with the Natural Resources Conservation Agency (BKSDA) RKW Cilacap regarding the activity plan, including support for survey team members and vehicle loans. © Prajawan K.W

Together, these activities aim to protect Rhinagrion tricolor habitats, map current populations, and support lasting conservation impacts for stakeholders, schools, and conservation institutions.

Initiation of communication with the Ministry of Immigration and Corrections (Kemenimipas) Nusakambangan regarding the activity plan and research permits within their jurisdiction, which covers approximately 80% of the island. © Endemic Indonesia Society

Initiation of communication with the Ministry of Immigration and Corrections (Kemenimipas) Nusakambangan regarding the activity plan and research permits within their jurisdiction, which covers approximately 80% of the island. © Endemic Indonesia Society

During the preliminary survey, one male individual of Rhinagrion tricolor was recorded at a new location within the Kemenimipas area, situated not far from a dam currently under construction. © Hening T.R

During the preliminary survey, one male individual of Rhinagrion tricolor was recorded at a new location within the Kemenimipas area, situated not far from a dam currently under construction. © Hening T.R

Documentation process of Rhinagrion tricolor in the vicinity of Nirbaya Prison. © Hening T.R

Documentation process of Rhinagrion tricolor in the vicinity of Nirbaya Prison. © Hening T.R

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