The Gibbon is the Only Monogamous Ape

The Gibbon The several species of Gibbon are referred to as the Lesser Apes. They are smaller than the Great Apes, the Gorilla, Orangutan, Chimpanzee and Bonobo. The biggest species of Gibbon is the Siamang which grows to about 14 Kg (31 lb). The Bonobo is the smallest of the Great Apes, on average, and