The only truly accurate way to determine the sex of your parrot is through DNA testing. The adolescent birds resemble the adults and it is particularly difficult to tell the difference between a male and female. The size of the head can sometimes provide a clue as to the sex of the parrot as the adult male generally has a slightly larger head. However this is not a consistent occurrence and many females will have the same black eye colouring of their male counterparts. The females can sometimes be identified through the colour of their eyes, they tend to have slightly lighter, reddish/brown tinge to their iris. The crest is also used during courting displays. They will also display their crest in excitement and during play. Their crest is used as a form of communication and is often raised to express distress, fear or as a warning to stay away, but this is not always the case. Their distinguishing crest is a unique characteristic, which is exclusive to only cockatoos, and their much smaller cousin, the cockatiel. Both their beak and feet are dark, almost black. They have yellow feathers under their wings and tail. They have a very fine powder that waterproof their feathers. They have a lovely light tint of yellow just below their eyes near the back of their cheek area. The Sulphur Crested Cockatoos is an impressive large white parrot with a striking yellow crest. This picture was taken by Amos T Fairchild and located at site Australian Sulphur Crested Cockatoo - Cacatua galerita.
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