CONSIDERATIONS TO KNOW ABOUT FERTILE EGGS

I'm no pro on swans. I rather think that an evening-time predator filched the eggs. I have listened to individuals mention that their birds( chickens, geese, no matter what) take away infertile or nonviable eggs from their nest. In 40 yrs I have not experienced a fowl remove their own individual egg/s within the nest aside from unintentionally. Wh