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KUCHING: A critically endangered three-coloured langur and its infant have been sighted in the wild, confirming that the species is still reproducing naturally, the New Straits Times reported.

Sarawak Forestry Department (JHS) senior researcher Dr Ahmad Ampeng said the sighting offers signs of population recovery, likely supported by state-led conservation efforts.

He credited the gazettement of an 845-hectare area in Sungai Selai Inah, Jemoreng, as a Permanent Forest Reserve for helping preserve the species' habitat.

Ahmad said the langurs are highly sensitive to human scent and sound, prompting researchers to wear the same unwashed clothing for months and use silent camera traps.

Classified as critically endangered by the IUCN, the species was last recorded in Maludam Forest Reserve in 1832, with its recent rediscovery confirmed via camera footage collected since July 2022.