Best ducks for brooding and raising young, by far, are Muscovies. They are also far and away the best for eating, being a tropical tree duck unrelated to other domestic ducks (all of which are descended frim Mallards) and having a texture very like fine beef without the greasiness of other breeds of duck. Ours are excellent layers, from around April 1st to the last of October, giving us 7 or 8 eggs every day, eagerly hatching their own young if we quit taking all the eggs, and they are excellent mothers. We clip the wings to keep them from flying, and they are great foragers and insect eaters. They even keep down the fly population among the horses. In the garden they managed 90% bug control. We also have two Pekins, and the only reason we still have them is because the female Pekin gives us one egg a day all year, even in winter. The Pekin drake is a noisy thug, the male Muscovies are gentle with the hens and ducklings. I'm sold on these striking and very useful birds. By the way, they will not usually interbreed if they have a partner of their own kind. If you do cross Muscovies and mallard-descended ducks, i.e., all other domestic ducks) the offspring will be sterile, as is a mule ( horse/*** hybrid).