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A gynandromorph

This is something that you don’t see everyday, a bird wing Butterfly that is both male and female. A gynandromorph is an organism that contains both male and female characteristics. The term from Greek “gyne” female and “andro” male. Right side female & the left. This is an example of Sexual dimorphism. That is to say a phenotypic differentiation between males and females of the same species. This differentiation happens in organisms who reproduce through sexual reproduction. In 1871 Charles Darwin advanced the theory of sexual selection, which related sexual dimorphism with sexual selection.

One of the earliest examples of this is the size differentiation of sperm and eggs (anisogamy), but the evolutionary significance of sexual dimorphism is more complex than that would suggest. This is part of a book I’m editing for on Evolutionary Evidence. I shot this one in a million butterfly at the @nfinsectarium. @robertclarkphoto @instituteartist @natgeo @thephotosociety

  
Repost from IG @natgeo

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