All wild cockatiel chicks and juveniles appearance lady, and are without a doubt indistinguishable from the time of hatching till their first moulting. They display horizontal yellow stripes or bars on the ventral floor in their tail feathers, yellow spots at the ventral surface of the primary flight feathers in their wings, a grey colored crest and face, and a stupid orange patch on each of their cheeks.
Adult lutino cockatiels are sexually dimorphic, even though to a lesser degree than many different avian species. This is best obvious after the primary moulting, usually happening about six to nine months after hatching: the male loses the white or yellow barring and spots on the bottom of his tail feathers and wings. The grey feathers on his cheeks and crest are changed by way of brilliant yellow feathers, while the orange cheek patch becomes brighter and more awesome. The face and crest of the lady will commonly remain commonly grey, though also with an orange cheek patch. Additionally, the female generally keeps the horizontal barring on the underside of her tail feathers. The shade in cockatiels is derived from pigments: melanin (which affords the gray coloration in the feathers, eyes, beak, and ft), and lipochromes (which provide the yellow shade at the face and tail and the orange colour of the cheek patch). The grey shade of the melanin overrides the yellow and orange of the lipochromes while both are gift. The melanin content decreases inside the face of the men as they mature, permitting the yellow and orange lipochromes to be extra visible, at the same time as an increase in melanin content in the tail reasons the disappearance of the horizontal yellow tail bars. In addition to those seen characteristics, the vocalisation of adult men is generally louder and more complicated than that of women.
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