On the Brink of Extinction: Population Status and Conservation Priorities for Trimeresurus truongsonensis in Vietnam

25 Aug 2025 Phong Nha–Ke Bang National Park, Quang Binh Province, Vietnam, Asia Biodiversity | Education | Reptiles

Tuoi Thi Hoang


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The Truong Son pit viper (Trimeresurus truongsonensis Orlov, Ryabov, Bui & Ho, 2004) is classified as Endangered (EN) by the IUCN (2025) due to its restricted distribution and endemic status. To date, it has only been recorded in Phong Nha–Ke Bang National Park (PN-KB NP), Quang Binh Province, which spans 85,754 ha with a buffer zone of 220,055 ha across 13 communes inhabited by ethnic communities such as the Chut and Van Kieu. Within this area, T. truongsonensis faces major threats including habitat loss from illegal logging and slash-and-burn agriculture, illegal hunting, and human–snake conflict—particularly snake killings driven by fear and limited awareness. Despite its conservation importance, little is known about the species’ population status, ecological needs, or microhabitat preferences. This lack of knowledge restricts the development of effective conservation strategies. The project aims to address these gaps and contribute to broader wildlife conservation in PN-KB NP, with a focus on the Truong Son pit viper.

Target species Trimeresurus truongsonensis. @ Tuoi Thi Hoang.

Target species Trimeresurus truongsonensis. @ Tuoi Thi Hoang.

The objectives are fourfold. First, to assess population structure, including age classes, sex ratios, distribution, home range, movement behaviour, microhabitat use, and threats. This will identify priority areas and guide species-specific protection. Second, to strengthen the capacity of park staff through training on snake monitoring and conservation using modern equipment. Third, to promote community involvement by raising awareness and piloting community-based snake rescue teams trained to respond safely to snake encounters and reduce conflict. Finally, to translate research findings into practical conservation tools, including improved monitoring protocols, adaptive management strategies, and a model for community-based rescue initiatives. By combining scientific research, capacity building, and community engagement, this project will safeguard T. truongsonensis while enhancing the conservation of PN-KB NP’s unique ecosystems.

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