BLACK SWAN EGGS FOR SALE NO FURTHER A MYSTERY

I am no professional on swans. I instead imagine that an evening-time predator filched the eggs. I have heard men and women express more info that their birds( chickens, geese, whichever) get rid of infertile or nonviable eggs from their nest. In 40 several years I haven't experienced a bird clear away their particular egg/s in the nest besides uni