SWAN EGGS FOR SALE FOR DUMMIES

I'm no expert on swans. I instead are convinced an evening-time predator filched the eggs. I have listened to people state that their birds( chickens, geese, what ever) get rid of infertile or nonviable eggs from their nest. In 40 several years I haven't had a chicken get rid of their own egg/s within the nest besides unintentionally. More seasone