The Cape starling is a gregarious bird and forms large flocks in the non-breeding season. It usually feeds on the ground often foraging alongside other species of starlings such as the pied starling, the common starling, the greater blue-eared starling, the lesser blue-eared starling, the wattled starling and Burchell's starling. It is habituated to humans and its diet includes fruit, insects and nectar. It sometimes feeds on ectoparasites that it picks off the backs of animals and it sometimes visits bird tables for scraps. It nests in crevices such as holes in trees and out-competes other birds seeking to use these holes. It is a host to the greater honeyguide, a brood parasite that lays its eggs in other birds' nests.