Breeding typically occurs after the rains during the dry season that can last from April to November. The onset of breeding can vary in timing throughout the species’ range, but usually lasts for three months and probably coincides with maximum fish stocks and density following fish reproduction in the rainy season. In South Sumatra for example, the milky stork can breed June–September, and has been observed in breeding plumage in May, or as early as February. Breeding is probably slightly earlier in Java given that eggs have been found in nests here as early as March, with one report of a clutch fledging in July (Hoogerwerf, 1936). Breeding in Java is however probably commonest July–August. At Tonle Sap in Cambodia, egg-laying can begin in January and February where the dry season begins even earlier. In Malaysia, eggs have been found in nests exclusively in August.