Symphalangus syndactylus survives mainly on leaves and fruit, but also eats insects, bird eggs, and small vertebrates. Symphalangus syndactylus eats a far higher proportion of leaves than any other gibbon (43 to 48 percent). During much of their feeding time they are suspended by one arm.
(Preuschoft, 1990; Chivers, 1979)
Animal Foods: eggs; insects
Plant Foods: leaves; fruit
Primary Diet: herbivore (Folivore , Frugivore )