![]() Researchers believe that when the penis becomes erect, it does so with lymph. When not erect, the penis is coiled along the wall of the cloaca, taking on a corkscrew-type shape. There is a shaft around the duck’s penis, and it is visually unique when it is not erect. Only certain species of domestic birds have this organ such as chickens, turkeys, and geese, in addition to ducks. What Does A Duck Penis Look Like?Ī duck’s penis is a single intermittent organ referred to as a “true penis”. This is likely why ducks have evolved breed through internal fertilization versus external - although it isn’t clear why most birds haven’t evolved to adopt this approach. There are advantages to internal fertilization over external fertilization because the transfer of sperm is more likely to be successful. ![]() However, ducks reproduce via internal fertilization by their phallus appendange. Most birds mate by external fertilization, transferring sperm through the rubbing of their cloacas. Unlike most birds, male ducks do actually have a phallus. From the vas deferens, the sperm makes its way to the cloaca. The sperm then moves to the vas deferens - a duct that transfers the sperm to the urethra. When they mate, the sperm moves to the epididymis - a duct located behind the testes that is connected to the vas deferens. ![]() During mating, the testes will become significantly enlarged. Similarly to many animals, male ducks have testes where they produce sperm. Many people are surprised to discover the duck sex is more closely related to human reproduction than that of other birds. The act of duck reproduction is an interesting one. The complexity of the organs ensures that the female chooses who fertilizes her eggs. A female’s vaginal canal is even more intricate. The strange part is that males have a corkscrew-shaped penis. Unlike how do birds mate in thorough external fertilization, ducks breed through internal fertilization. However, ducks can become very aggressive during mating season, and if they try to force a female duck to mate with them, their rate of successful sperm transfer is very low. We don’t usually think of birds as having a penis, but male ducks do.Īn external sex organ allows them to potentially have more successful sperm transfer. Have you ever wondered, what do ducks have under there? The answer may surprise you.
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