During regular copulation, the female anatomy works counter-clockwise to the male’s. When copulation is forced — which it often is — a female duck’s elaborate anatomy protects them with ...

If you buy something using links in our stories, we may earn a commission. Learn more. The first intimate duck videos show that it’s mate and checkmate in the battle of the sexes. High-speed ...

While the anatomy of the female is usually very simple ... I was curious to know if there were consequences to female ducks of the tremendous anatomical variation found in the male phallus ...

Prum and Brennan found that many female ducks die or suffer severe injuries from forced copulation. In order to study how duck anatomy has evolved in response to sexual conflict, Prum and Brennan used ...

A female Muscovy duck chooses a mate based on her assessment ... the females are using their complex vaginal anatomy to take back control over which sperm fertilises their eggs.

Dr. Brennan argues that elaborate female duck anatomy evolves as a countermeasure against aggressive males. “Once they choose a male, they’re making the best possible choice, and that’s the ...

Real female ducks have such shapes, even spirals that squiggle in the direction opposite to male anatomy. And Brennan has proposed that a female duck refusing to relax the tension in all her ...