Lucky you, muscovies are just the best ducks

They can fly VERY well and you will need to make sure that you clip a wing on each before you let them out. Once they have settled they would be unlikely to fly away, mine just try to get into the house if anything. My muzzies are free to roam a few paddocks here and are very happy like that. They do become very tame and have the most adorable characters, dancing and hissing around each other. I have found they are always in charge of other ducks breeds and chickens but are never mean, they just like to make sure they eat first

They don't need a pond but do like a daily wash in a paddling pool or something similar and are the best fly and bug catchers around. When handling them make sure you always have the feet under control as they have VERY sharp claws which can do a lot of damage. They are brilliant broodies and fantastic mothers.
I warn you it won't be long before you will want more, they are absolutely fabulous.