White-fronted Langur

A Bornean-endemic leaf monkey named for a diagnostic pale — whitish or pale buff — patch on the forehead, framed by darker fur, and topped with a tall, forward-leaning crest: the single most reliable field mark separating it from every other grey-brown Presbytis langur on this site, none of which share a forehead patch of this kind.

Lives in small folivorous troops moving through lowland and hill dipterocarp forest, generally considered shyer and less often encountered than the more familiar maroon and silvered langurs. Vulnerable (IUCN, assessed 2020), with a suspected decline of more than 30% over three generations from hunting and oil-palm-driven habitat loss.