Quite a few bird species and some other animals[2] can have chromosomes of both sexes[1]. When it happens to northern cardinals, they end up split down the midd

Quite a few bird species and some other animals[2] can have chromosomes of both sexes[1]. When it happens to northern cardinals, they end up split down the middle in color--one half gray like a female and one half red like a male[3]. [1] http://www.bbc.com/earth/story/20150916-these-animals-are-male-on-one-side-and-female-on-the-other http://www.bbc.com/earth/story/20150916-these-animals-are-ma... [2] https://en.wikipedia.org/wiki/Gynandromorphism https://en.wikipedia.org/wiki/Gynandromorphism [3] http://www.remotesensingart.com/CardinalMF/index.html http://www.remotesensingart.com/CardinalMF/index.html