Bale monkey (Chlorocebus djamdjamensis) is an Old world monkey endemic to the Bale Mountains of Ethiopia. Discovered in 1902, little was known about the ecology and distribution of the species. Bale monkey is found exclusively in the bamboo forest. Bale monkeys feed on 11 plant species but bamboo compromises about 77% of their diet. They consumed mainly bamboo young leaves. Thus, bamboo is a key resource for the species.