DETAILS, FICTION AND GESTATION PERIOD FOR SWAN EGGS

I'm no qualified on swans. I rather believe that a night-time predator filched the eggs. I've read individuals express that their birds( chickens, geese, regardless of what) eliminate infertile or nonviable eggs from their nest. In 40 several years I have not had a bird clear away their unique egg/s within the nest apart from accidentally. Swan ne