How Does A Bird Egg Get Fertilized. In birds, the female is able to store the sperm until an egg is ready. This may in the opinion of scientists be the reason why birds must mate several times in order to fertilize one egg.

Like reptiles, birds have cloaca, or a single exit and entrance for sperm, eggs, and waste. Bird egg fertilization process takes place very early in the fallopian tube, before the egg white and yolk cover the ovum, that is, while the cells of the ovum are dividing. Penetration by multiple sperm may be unusual in the animal kingdom, but it is somehow crucial to the development of the bird embryo, a new study finds.