Duck eggs are typically larger than chicken eggs; they vary a bit in size but are usually around 50 percent larger than your standard jumbo chicken egg. They can come in all sorts of colors, varying mostly by breed. ... Its yolk, though, is what's so prized by chefs: a duck yolk is much bigger than a chicken yolk.
On nutritional aspect, the eggs of ducks are different than chicken eggs. Duck eggs have more magnesium, calcium, iron, vitamin B12, vitamin A, thiamin, etc. per 100 grams. They are a great source of omega 3 fatty acids, which are vital for a normal human metabolism.
Sold in dozens.