Muscovies are a very good breed, the males get to heavey to fly and the females usually won't, but If you are going to free range them right away I would clip one of her wings. she wouldn't fly far, but she could get into trouble.
They are considered a duck, but are from the goose family. She will lay all summer long and sometimes into the fall. They make excellent mother's and are very broody birds. You can put any kind of egg under them and they will hatch them. She will lay 1 a night, but being everything will be new she might not lay for a week or two.
They don't quack, they hiss and she will chirp when she is setting and peep to the babies. They are awsome to watch, because they are very affectionate. The male will greet her and her him. They will rub bills and necks and he will stay near her for protection while she is setting.
I have had muscovies for almost 10 years and I would miss them if they wern't here.
here is a pic of Max and Mrs. Muscovy, they now are the proud parents of 11, but I don't have a pic of them yet.
Julie