![]() Breeding interval Sulphur crested cockatoos breed once yearly.gonochoric/gonochoristic/dioecious (sexes separate).Both male and female Cacatua galerita reach reproductive maturity around the age of 3 to 4 years. Family units will remain together indefinitely. Offspring will leave the nest after this 70 day period but will remain with the parents year round. Fledging generally occurs at approximately 70 days. ![]() Eggs hatch after an incubation period of 27 to 30 days. They breed once yearly, producing a clutch containing 2 to 3 white oval eggs. They generally nest in a high tree hollow, usually near water. In the northern parts of their range, sulphur-crested cockatoos breed from May to September, whereas birds in the southern parts of their range breed from August to January. Before mating, the birds usually preen each other's plumage. Signs of courtship include raising of the crest, bobbing of the head, and moving the head from side to side in a figure-of-eight pattern while uttering soft chattering notes. Sulphur-crested cockatoos are monogamous birds.
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