Vietnam Primate Conservation Status Review 2002 - Hoang Lien ...

Vietnam Primate Conservation Status Review Part 2: LEAF MONKEYS
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Cat Tien National Park (DONG NAI, BINH PHUOC and LAM DONG)
Special use forest: National park
Indochinese Silvered langur status: Occurrence confirmed, last evidence in 2002 (G. Polet, pers.comm.)
One reliable sighting of one group was reported on 15 June 2000 (J. Barr). Another group of 8
animals was seen on 19 April 2001 (D. Hobcroft). Another group of more than 10 animals including
2 babies was observed on 9 June 2002 (G. Polet, pers. comm.).
Sightings of the species without details are also noted by Pham Nhat et al. (2001)
Nui Chua Nature Reserve (NINH THUAN)
Special use forest: Nature reserve
Indochinese Silvered langur status: Provisional occurrence, last report in 2000 (specimen)(Ha Thang
Long, 2001)
During a SIERES survey of the locality in April 2000, one animal was found in the house of a wildlife
trader near to the headquarters of the nature reserve (Vu Ngoc Long, 2001). However, this is the only
information from this area. The species was also not reported during a FZS survey in August 2001.
It is unlikely that the species occurs in the nature reserve.
Bien Lac-Nui Ong Nature Reserve (BINH THUAN)
Special use forest: Nature reserve
Indochinese Silvered langur status: Provisional occurrence, last report in 1998 (specimen) (Ngo Van
Tri, 1999b)
FFI conducted a short field survey in September 1999 to assess the status of elephants in the nature
reserve. The team saw one Indochinese Silvered langur trophy shot from a group of 7 to 11 animals
by a policeman in April 1998. However, the occurrence could not be confirmed. (Ngo Van Tri, 1999b)
Dinh Quan District (DONG NAI)
Special use forest: None
Indochinese Silvered langur status: Occurrence confirmed, last evidence in 1999 (Ngo Van Tri & Day, 1999)
From June to August 1999, FFI conducted a survey to examine the biological diversity of mammals
in the area. In July, one troop of at least 9 individuals (estimated at 14) was seen moving quietly in
the canopy near the Thac Mai Waterfall (11°06’05”N / 107°25’47”E) (Ngo Van Tri & Day, 1999).
Tay Ninh Province
Special use forest: Partly included in Lo Go Sa Mat Nature Reserve
Indochinese Silvered langur status: Provisional occurrence, last report in 1999 (interview, specimen)(Le
Trong Trai, pers. comm., 2000).
One infant was reported to have been collected in Nui Ba Den by A. Morice (1875) (museum unknown).
One immature male (museum unknown) collected by J. Delacour and W. P. Lowe between 1926 and