Common name for a
species of Leaf Monkey with the scientific
name Trachypithecus hatinhensis. It is a monotypic species, i.e. not a subspecies,
and is only found in Vietnam and
where it inhabits limestone forests.
The Hatinh Langur is very similar to the
Tonkin Leaf Monkey
mostly blackish with a brownish tinge and with white stripes on the cheeks.
However, in the Hatinh Langur this so-called white beard extends behind the ears
to the back of the head, whereas in the Tonkin Leaf Monkey, the white stripes on
the cheeks run from mouth to ears and do not extend to the nape. It is also very
similar to the Laotian Langur (Trachypithecus laotum), which is endemic to Laos,
and besides a clear genetic difference between the two, the white cheeks also
extend to behind the ears, though some may have largely white heads, with or
without a dark crest, whereas yet others may have nearly unmarked, black heads.
There are currently an estimated 600 animals still living in the wild.