Hose’s Langur

• Common Name: Gray leaf monkey
• Taxonomy Classification Year: 1889
• Monkey Size: 48 to 56 cm (19 to 22 in)
• Skin Color(s): Gray
• Habitat: Forest, rainforest
• Diet: Herbivorous
• Native Countries: Borneo, Indonesia, Malaysia

The Hose’s langur^[1] (Presbytis hosei) is a primate species in the Cercopithecidae family native to the island of Borneo, which includes Brunei, Kalimantan (Indonesia), and eastern Malaysia.

• Hose’s langur is a relatively small and slender primate, characterized by a high forehead and a prominent forward-sloping crest in the center of the crown.
• Coat color varies between subspecies but is gray mainly on the back, white on the chest and stomach, and blackish on the feet and hands.
• The face is pink, with a distinctive black stripe marking each cheek.
• Babies are easy to tell apart as white with black lines down their backs and shoulders.
• Groups (probably adult males) often emit a unique gurgling vocalization.

• The species was first identified in 1985 in Sangkulirang Peninsula and Kutai National Park in East Kalimantan, Indonesia.
• Its natural habitat is tropical or subtropical dry forests.
• This tree-dwelling monkey moves primarily through the intermediate levels of the forest canopy, and to descend to visit natural mineral springs.
• The loss of its natural habitat threatens these langurs.
• Hose’s langur densities correlated positively with tree height, first bough height, tree diameter, and canopy and negatively with soil and subsoil vegetation cover.