They prefer, however, Acacia seeds. The breeding season seems to depend on climatic conditions, especially in rainfall. The species usually begins breeding after the rainy season. Nesting starts in August and continues through December. Nests are usually located in a hole of a eucalypt tree that is standing near water.
Clutch size ranges from four to six rounded eggs.
Incubation lasts 18 to 20 days. The Cockatiel is one of the few species of parrots that share brooding duties between the male and the female. Both parents feed the chicks from the time they are hatched. The pair bond between two birds can be quite strong and they may remain partners for life. The Cockatiel is often observed in pairs or small flocks.