Female Water Striders Expose Their Genitalia Only After Males 'S...

Courtesy ScienceDaily  Thu, 06/11/2009 - 18:00

Biologists 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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