East Sumatran Banded Langur

• Common Names: East Sumatran Banded Langur, East Sumatran Banded Surili
• Taxonomy Classification Year: 1908
• Monkey Size: 43 to 61 cm (17 to 24 in)
• Skin Color(s): Black
• Habitat: Rainforest
• Diet: Herbivorous
• Native Countries: Indonesia

The East Sumatran banded langur^[1], also called the East Sumatran banded surili, is a monkey species in the Cercopithecidae family.

• Slender limbs perfect for arboreal life and a long tail that project from the banded surili’s lanky body.
• The hair on their head tends to let loose in a mohawk configuration or triangular tuft. Dark eyes search through two white circles for fruit in the canopy.
• The species is covered in dark fur coats that are surprisingly lighter on the belly, varying from bright white to duller gray stripes.
• As with all colobine monkeys, whose young typically have lighter fur than adults, banded surilis infants have white or fawn-colored fur until they begin darkening at around 6 months.

• In the Riau province of Sumatra, East Sumatran Banded langurs are primarily found in the fragmented landscape of pulp and rubber plantations.
• Generally, these surilis are shy and alert creatures, rarely leaving the comfort of their canopies.
• They are very social. However, their refusal to be closely studied or observed leaves their daily routines and habits mainly unknown to humans.
• The species lives in groups of at least 3 individuals but no more than 20 individuals, with an average group size of about 11.
• East Sumatran Banded langurs send out a distinctive alarm call whenever they sense danger. Researchers have compared its sound to the crackle of a machine gun.