Fertile Swans eggs for hatching.
Once in the oviduct, the sperm then rapidly swim up the tube into the infundibulum. If there is a ripe ovum there (one that’s just been released from the ovary), the sperm can fertilise the egg and an embryo (a soon to be baby swan) will be formed. … The first layer to go onto the swan’s egg is the albumen.
|Egg Length:||4.0-5.0 in (10.1-12.6 cm)|
|Egg Width:||2.4-3.2 in (6.2-8.1 cm)|
|Incubation Period:||32-37 days|
|Egg Description:||Creamy to dull white, often stained brown in the nest.|
Can a black swan mate with a white swan?
The black swans could mate with white swans as a hybrid has been successfully bred in captivity and is called a blute swan. These birds would be an extraordinary site but may not be the best outcome for the swan population.