Male ducks reproductive organs can be the length of their entire body .. anyone need a wine opener? : r/Damnthatsinteresting
Why are duck penises corkscrew-shaped and how do they mate? | BBC Science Focus Magazine
In male ducks, social competition spurs changes in genitalia | YaleNews
There is a Type of Duck That Sometimes Lassos its Potential Mates with its Penis
Found! The longest bird penis ever › News in Science (ABC Science)
Ducks who hang out in big groups have larger penises
Lake duck - Wikipedia
Duck penises grow bigger when males spend time together | Daily Mail Online
Prolapsed Phallus in Ducks | BackYard Chickens - Learn How to Raise Chickens
Do Birds Have Penises? | Bird Reproduction | Bird Spot
Duck Penises Vary a Lot in Size And Growth, And That's Actually Really Bizarre : ScienceAlert
Sexual competition among ducks wreaks havoc on penis size | Nature
Duck Penises Grow Bigger Among Rivals
Male ducks worry about penis size too according to study | Boing Boing
How do ducks have sex with their corkscrew-shaped penises? | Metro News
Why are duck penises corkscrew-shaped and how do they mate? | BBC Science Focus Magazine
Do Ducks Have a Penis? - Cackle Hatchery
Ducks who hang out in big groups have larger penises
Ducks Wage Genital Warfare | Live Science
Evidence of phenotypic plasticity of penis morphology and delayed reproductive maturation in response to male competition in waterfowl
Argentine Blue-bill, Argentine Lake Duck or Argentine Ruddy Duck
Science News - Freaky Friday Lake ducks The male lake duck is in the 3% of birds that have penises. More curiously, it has the longest penis of all vertebrates in comparison
Lake duck - Wikipedia
The horrible thing you never knew about ducks
