![]() 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. Sexual Dimorphism: sexes colored or patterned differently Other Physical Features: endothermic homoiothermic bilateral symmetry triton both average smaller in overall size than C. galerita in having a pale blue eye ring instead of white, the yellow feathers are slightly darker, and the crest feathers are longer. Cacatua galerita fitzroyi differs from C. There are four subspecies of sulphur-crested cockatoos. Females and males are similar in appearance (monomorphic) however, females can be identified at close range by their red tinted brown eyes, whereas males have darker brown eyes. The underside of their wings and tail is pale yellow. Sulphur-crested cockatoos are white with a distinctive sulphur-yellow crest which can be erected or held folded down on top of head. Retrieved 3 January 2023.Sulphur-crested cockatoos are large birds, measuring 45 to 50 centimeters in length. : Cite journal requires |journal= ( help) The Cockatoos: A Complete Guide to the 21 Species. Birds of New Guinea: Distribution, Taxonomy, and Systematics. ^ a b c "Sulphur-crested Cockatoo Fact Sheet".^ a b c d "Triton sulphur-crested cockatoo".^ "Triton Cockatoos | Beauty of Birds". ![]()
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