The white-fronted langur is a Bornean monkey with gray-brown fur and a white bare patch on its forehead. It is active by day, but its detailed ecology is poorly known.
Its coat is mainly gray-brown, with a bare white patch on the forehead. The patch is triangular or square depending on the subspecies described in the source.
It is active by day. At about 08:30 on 23 October 2018, two langurs were seen eating young leaves about 25 m up a tree in natural secondary forest at Bukit Santuai, Central Kalimantan. One appeared to be an adult and the smaller animal a subadult. After five minutes, both climbed down the tree.
An extinction-risk assessment has not been added yet.