DETAILS, FICTION AND GESTATION PERIOD FOR SWAN EGGS

I am no skilled on swans. I instead feel that an evening-time predator filched the eggs. I've heard people today state that their birds( chickens, geese, whatsoever) take out infertile or nonviable eggs from their nest. In 40 years I have never experienced a bird remove their particular egg/s through the nest other than unintentionally. Hahira, GA