has rescripted this particular battle of the sexes and recast the winner as female. Her work demonstrates how you can’t judge a book by its cover; the duck’s hidden reproductive anatomy reveals a very different story to the one suggested by their outward behaviour. Female ducks are not passive victims but active agents driving their own evolution, along with that of males. Such antagonistic co-evolution is of course a conversation, or perhaps an argument, between the male and the female that plays out over deep time. And the only way to understand it is by paying attention to both sides of the
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