How Do Birds Fertilize Eggs Video

February 15, 2024

Whether the chicken came first or the egg has been debated for so long that it has sunk into both science and philosophy. What we do know is that birds are sexually dimorphic, meaning they have both male and female reproductive organs. But how do birds fertilize their eggs? The answer to this question lies in their mating ritual.

During the mating process, the male and female bird rub their cloaca, which is their single exit/entry point for eggs, sperms, and waste matter, on each other. During this friction, the rooster’s sperm is ejected into the hen’s chamber and fertilizes her egg. The hen then lays her egg and sits on it until it hatches.

In order to do this, the rooster will perform a flamboyant dance with the hen. He will circle her and move his feet in a rhythmic pattern, almost like a chicken version of a ballroom dance. This will attract the hen and convince her to consent to mating. Once she does, she will crouch down and flatten her back to allow the rooster to mount her.

The rooster will then rub his cloaca on the hen’s cloaca until he deposits his sperm inside the female ovary. This will then fertilize the egg and the hen will lay it. However, this is not the only way for an egg to be fertilized. Hens can also mate with other males, but this will not guarantee fertilization. It is for this reason that many of the eggs you buy at stores are not fertilized.


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