The black-breasted buzzard lays its eggs from August to October, with breeding believed to be stimulated by increased day length, as well as by increased food availability often linked to rainfall events.[1][2] A usual clutch comprises two eggs laid at an interval of approximately 8–13 days and incubated for a period of 32–38 days.[3] Nestlings remain in the nest for between 68–73 days before fledging around December.[4][9] The female tends the nest for the majority of time while the male hunts and returns food.[4] Usually only one chick per nest survives to fledge each season.[9]