The first intimate duck videos show that it’s mate and checkmate in the battle of the sexes. High-speed cameras document that a male Muscovy duck can fully extend his 20-centimeter penis in a third of ...

Male ducks are infamous for their bizarre penises, which are corkscrew-shaped, exceptionally long and develop anew each year. Researchers have now found that the size of a male duck's penis changes ...

In the past week, Yale ornithology professor Richard Prum has come under attack from various media outlets for his study of ducks’ sexual anatomy and forced copulation. Fox News, PolitiFact and ...

Lady ducks have evolved a unique way of avoiding the unwanted advances of, er, enthusiastic suitors, according to Yale scientists. According to researchers, while male ducks have developed longer, ...

Male ducks respond to sexual competition by growing either an extra-long penis or a nub of flesh, a new study finds. The unusual phenomena occurred in two species studied: the lesser scaup (Aythya ...