The proboscis monkey, Nasalis larvatus, is an endemic species to the island of Borneo. It is listed in the IUCN Red List as Endangered with a decreasing population trend. Nevertheless, biological information, especially on the genetic diversity of the species, is still incomplete. Its fragmented distribution poses difficulties in gathering genetic samples along with its widespread distribution across Borneo. This study aims to determine the genetic variation and structure of N. larvatus with an emphasis on Malaysian Borneo populations to elucidate its gene flow. The genetic variation and structure of N. larvatus were examined using 50 sequences of the 1,434-bp cytochrome oxidase subunit I (COI) gene region of mitochondrial DNA. The COI sequences revealed low genetic variation among N. larvatus populations in Malaysian Borneo. This low genetic variability could be the result of inbreeding pressure that may have occurred due to the absence of population expansion in this species over the last 30,000 years. This is supported in our analysis of molecular variance, which showed that groups of N. larvatus are significantly differentiated possibly due to natural geographic barriers. This study provides baseline information on the genetic diversity among proboscis monkey populations in Borneo for the future genetic assessment of the species.

A survey on small mammals was conducted at Bukit Taat, Tasik Kenyir from 2nd to 5th September 2014. Thissurvey aimed to document the species diversity of small mammals in Bukit Taat. A total of eight mist nets, twofour-bank harp traps and 50 cage traps baited with banana slices were used. A total of 36 individuals comprising14 species of chiropteran but none of non-volant small mammals were recorded. Hipposideros larvatus (36.1%of total individuals) were recorded as the most captured species followed by H. diadema (19.4% of totalindividuals) and Penthetor lucasi (8.3% of total individuals). This survey formed the first list of chiropteransrecorded at Bukit Taat, Tasik Kenyir, Hulu Terengganu, Malaysia.

A rapid and passive primate survey using a scanning technique was conducted in Sibuti Wildlife Sanctuary (Sibuti WS) from 11th to 16th July, 2018. This study provided the first confirmed record of the presence and the diet of silvered langur in the wildlife sanctuary. A group of silvered langur that comprise 20 to 30 individuals were observed in the vicinity of the sanctuary. The diurnal langur feeds on fig plants (Ficus sp.), simpoh air (Dillenia suffruticosa) and tree from the family Leguminosae. However, this langur population appears to be isolated and is probably decreasing due to limited food sources, intra- and interspecific competition, and  hunting pressure by local people.