How Do Eggs Form In Birds - Calcium carbonate, carried by blood vessels, is deposited on the soft egg membrane where it will harden and set forming the shell. The formation of bird eggs and hatching. The egg cell, or ovum, of a bird is small at first when it lies in the ovary. The creation of every bird’s egg is a complicated process that occurs within the female’s reproductive tract. Birds have to time the hatching of their eggs carefully, to make sure they can feed and protect them.subscribe:.
The creation of every bird’s egg is a complicated process that occurs within the female’s reproductive tract. The formation of bird eggs and hatching. The egg cell, or ovum, of a bird is small at first when it lies in the ovary. Calcium carbonate, carried by blood vessels, is deposited on the soft egg membrane where it will harden and set forming the shell. Birds have to time the hatching of their eggs carefully, to make sure they can feed and protect them.subscribe:.