Javan Surili

• Common Name: Grizzled leaf monkey
• Taxonomy Classification Year: 1822
• Monkey Size: 43 to 59.5 cm (16.93 to 23.43 in)
• Skin Color(s): Dark gray to white
• Habitat: Forest, rainforest
• Diet: Herbivorous
• Native Countries: Indonesia

The grizzled surili^[1] (Presbytis comata) is a threatened species of Old World monkey native to the western half of Java, Indonesia, a biodiversity hotspot.

• Other common names by which it is known are Javan surili; Grey, Grizzled or Sunda Island Surili; stripe-crested or grizzled langur; Javanese grizzled langur; grizzled, Javan or Java leaf monkey.
• The coat color of the grizzled surili ranges from whitish in some populations to dark gray or nearly black in others.
• Their ventral fur, on their chest and abdomen, is bright white from their chin to their long tail, and the “grizzled” part of its name refers to the mixture of colors in their dense, fluffy fur.
• As with other langurs, their heads are relatively small compared to their body size.
• The grizzled surili has long limbs, a small, pinched face, round, dark eyes, and small, protruding ears.
• They are agile jumpers with prehensile fingers and are reluctant to leave the forest canopy.

• The grizzled surili engages in 3 to 4 foraging and feeding fights throughout the day.
• They travel among the upper treetops, retreating at night to high ridges and trees to roost.
• Groups are made up of 2 to 14 individuals, with only 1 or 2 adult males.
• The grizzled surili is known to be friendly with the West Javan ebony langur (Trachypithecus mauritius) and the East Javan langur (Trachypithecus auratus).
• Like all other leaf monkeys, the grizzled surili has a large, multi-chambered stomach that can digest cellulose, allowing it to consume and digest plant fibers.