Cockatoos possess crests and cheek feathers that may be raised or lowered at will. These are used to communicate with fellow members of their "flock", or as a form of defense to frighten away other species that approach too closely, making the bird appear larger when the crest is suddenly and unexpectedly raised. Here, Chantilly was trying to get my attention, and once she saw I thought it was attractive, kept it up to please me lol. Very cute!

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