因此，这种舞姿—揭露了脚掌的颜色，所以雌性不会把它们和红脚鲣鸟或是蟹脚鲣鸟弄混。
Hence , this dance - the revelation of foot color , so that the female will not by mistake mate with a red-footed booby , or even a crab-footed booby .
红脚鲣鸟