In Ducks, War of the Sexes Plays Out in the Evolution of Genitalia - New York Times
Who knew that duck's had such strange genitalia:
Dr. Brennan, a post-doctoral researcher at Yale University and the University of Sheffield, visits the sanctuary every two weeks to measure the phalluses of six species of ducks.
When she first visited in January, the phalluses were the size of rice grains. Now many of them are growing rapidly. The champion phallus from this Meller’s duck is a long, spiraling tentacle. Some ducks grow phalluses as long as their entire body. In the fall, the genitalia will disappear, only to reappear next spring.
Not much chance of a duck hiding his interest during summer.
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