Animal Behavior: The mated pair. Along with their offspring occupy a fiercely defended and stable territory. The loud calls of the gibbon are used to identify individuals within and outside the family group. The male and female will intimidate neighbors and mark their territory by singing a duet.

Eating Habits: Hoolock gibbons are generally frugivorous. Fruits may be mixed with insects, leaves, and other vegetable matter. Ripe pulpy fruit is preferred. Small vertebrates and eggs may be eaten occasionally.

Range: Hoolock gibbons are found in forested areas from eastern India and Bangladesh to Myanmar and southern China.

Conservation Efforts: The increased problem of habitat fragmentation is of much concern.

Animal Facts: Generally, about 35 percent of daily activity is spent feeding. Their meat is highly prized in parts of eastern India. Gibbons can live as long as 44 years in captivity