We already know which man has the largest penis in the world, and which animal has the worlds largest penis, but do you know what animal has the largest penis relative to its body size? As we have already read, the blue whale has the largest penis of all the animals in the world, but it is also the largest animal in the world, so one would expect it to posses a very large penis. As for Jonah Falconer and his terrifying beast that measures longer than most school rulers, although he stretches far beyond the average man, by comparison to the length of his body he doesn’t even come close to the world leader among vertebrates. The animal with the worlds largest penis relative to the size of its body is the Lake duck, a native duck of South America.
Just how big is this ducks penis? One specimens penis measured a remarkable 42.5 cm (17 inches) long, while for the average duck it will measure about 20 cm (8 inches), and both of those measurements were when the ducks penis was flaccid! While both measurements would put most men to shame, especially the larger specimen, a few questions remain. Where do they put their penis to protect if from damage if it is so big, and why is it so big?
While most birds don’t have a penis, ducks are one of the few birds that do. The penis of the lake duck is a long corkscrew. When the penis is flaccid it can store it curled up inside the cloaca. Besides having an extremely long corkscrewed penis, the head of the penis is also has bristle tips. It is believed that the extremely long penis combined with the bristle tips allows the male to clean the females vagina from competitors sperm, in a similar fashion that using a bottle brush cleans a bottle.
Surprisingly, the female lake duck has a corkscrew vagina, which turns in the opposite direction which makes forced sex almost impossible.
To put the length of this ducks penis into comparison, it would be the equivalent of a man having a penis that is 3.5 m (12 feet) long!