Hidden genitalia in female water striders makes males 'sing'

In a study published in the open-access, peer-reviewed journal PLoS ONE 10 June Chang Seok Han and Piotr Jablonski at Seoul National University, Korea, report that by evolving a morphological shield to protect their genitalia from males' forceful copulatory attempts, females of an Asian species of water strider seem to 'win' the evolutionary arms race between the sexes. Instead, females only expose their genitalia for copulation after males produce a courtship 'song' by tapping the water surface...

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