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37 rare Delacour’s langurs discovered in northern Vietnam

12/31/2025 9:27:00 AM

Scientists have identified a group of 37 critically endangered Delacour’s langurs in Ninh Binh Province, highlighting the area’s growing importance for wildlife conservation.

Researchers have confirmed the presence of 37 Delacour’s langurs in a protected forest in the northern province of Ninh Binh after months of surveys using camera traps and drones.

The discovery was announced on December 30, 2025, by authorities in Dong Thai Commune and the Centre for Environmental Resources and Climate Change (CE REC), following fieldwork in the commune’s 2,800-hectare protection forest.

At least 37 individuals were recorded in a limestone forest complex. The Delacour’s langur (Trachypithecus delacouri), which is endemic to Vietnam, is listed as critically endangered on the IUCN Red List and in Vietnam’s Red Data Book.

Dong Thai Forest is now home to the country’s third-largest known population of the species, which a CE REC expert described as a national treasure requiring stronger protection measures.

The limestone forest also supports a wide range of rare wildlife, including 12 mammal species and 15 bird species listed on national and global red lists, and is seen as having strong potential for sustainable ecotourism.

Local authorities said the survey, the first scientifically structured biodiversity assessment conducted in the area, has produced reliable data to guide forest protection, biodiversity conservation and long-term planning for nature-based tourism.

The Delacour’s langur is found only in Vietnam, with an estimated population of just over 200 individuals across 18 isolated sites in Ninh Binh, Phu Tho and Thanh Hoa provinces. The largest remaining populations are in Van Long Nature Reserve and Kim Bang.

Source: Dtinews

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