The Duck Penis (and Vagina), Part II: Fowl Designs | Curious Cox
What does a Duck Penis Look Like *Ducks Mating In The Bath Tub* - YouTube
Nome at Dice dot Camp on Twitter: "But Ducks are in this arms race, right? So Males, I shit you not, grow a penis every mating season. Like Deer antlers. And because
Duck has penis removed after mating 10 times a day
Why are duck penises corkscrew-shaped and how do they mate? | BBC Science Focus Magazine