The siamang belongs to a family of apes called gibbons, and is well-known for
its morning songs in the rain forests of the Malaysian peninsula and Sumatra.
Male and female pairs sing a duet for about a half-hour to help establish their
territory to other siamangs in the area.
Siamangs, who live their entire lives in the treetops, mate with one partner
for life. They mostly feed on fruits, flowers, and young leaves. Siamangs face
threats from logging and agricultural practices that shrink the forest, and
from poachers seeking them out for the pet trade.