Our experience with our ducks is that they are very similar, although they are more social in their nesting behavior. Unlike our hens who like to sit 3 high on eggs, our ducks will be side by side by side (maybe 3 or 4 on a nest)... One of our mothers last year actually scooped up an egg in her mouth and carried it to a nest when she got tired of rolling it!.... Now, I will suggest that you keep an eye on the "mothering" abilities of your ducks, Many of our baby ducks just wandered off after they were born as the mothers seemed a bit unaware of what to do, so we had to rescue and brood them.... One walked about 100 feet toward the end of our driveway before we rescued her!