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Indigo Bunting (Passarina cyanea) the male is a brilliant blue, and the female is a drab brown color. Sometimes when female Indigo Buntings out number males, the males will turn polygynous. Males and females of this species display very different coloration, this is called dimorphism. You will notice that one of the nestlings looks rather different from the others. That nestling is a Brown headed cowbird. The Brown headed cowbird makes no nest of their own. The female Brown headed cowbird finds other bird's nest and leaves her egg with the host.
Dedicated to my good friend Priyanka Banerjie
