The katta feeds mainly on plants, including fruits, leaves, flowers, and sometimes insects or bark, collecting food on trees with its hands and mouth. The species' diet includes fruits, leaves, flowers, insects, bark, and nectar, with a daily food requirement ranging from 150 g to 350 g. Katta offspring feed on milk. Among the preyed insect species are bedbugs, beetles, butterflies, diptera, hymenoptera, orthoptera, dragonfly, mayfly, and lacewings. The fossa is an enemy of this species.