When mine shimmy the male kinda of snaps his body, whips his tail , sending the females 180 or 360 degrees , he's very inamorata of them , eggs I think , no fry yet .
yeah, the snap is what I see when they are really interested! Also, when one of my females is guarding a cave, and the male gets to close, she snaps her tail at him....as if she's telling him to get lost! I love watching the behavior of cockatoos!
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he's very inamorata of them 
, eggs I think , no fry yet .