NOT KNOWN DETAILS ABOUT BLACK SWAN EGGS FOR SALE

Is it attainable the eggs might be fertile? can it be normal with the eggs being different shades of eco-friendly? I am aware I can glance this up from the books, but how long right until they hatch? All of our swans are DNA sexed and marked with everlasting metal bands. you can receive DNA certificates with the birds. All Swans are going to be pi