The Duck Test: If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck.
This may be true for most cases, but what about the Muscovy?
At my farm, the most important animal is the turkey. We started raising Royal Palm turkeys, then got some "Mini Royal Palms" (Brahmas), then, lastly, added some "Water Turkeys" (Muscovies). So you can image that I think that the "Water Turkeys" are very beautiful because of their caruncles. I was told by many people not to get Muscovies because they are very aggressive, but over the 18 years I've been around ducks, every Muscovy I've met or owned has always been very nice and loved attention.
Another thing to note is that Muscovies do not quack (another plus!) and are very quiet. They "dance" around when they walk by twerking their tails and bobbing their heads (they literally are the natural party animal) When they want to communicate, they whistle, hiss and do a little "chatter" sound. Throughout the day, my breeding ducks will all get together and have several "clubbing" sessions, dance together and that is as loud as they get when they all hiss and chatter together (normally this is at the pool). We like to hear our turkeys gobble and chuck-chuck-chuck to each other, our chickens when they lay an egg, the roosters when there is a predator and that is about it. A quiet yard creates happy neighbors (even if you live in the country like I do, you should always be considerate of your neighbors and Muscovies are great at that).
The best thing to note is that, although these ducks love water, you will not see them in it a whole lot! We have a swimming pool specifically just for the animals to take a dip in on hot days. They will take baths in the pool once or twice a day, but they do not sit in it all day like other ducks do. For some people, this is a pro, others it is a con. For me, it is a pro because having clean water in the pool is great for all of the chickens, turkeys and other Muscovies. Another pro for my farm is that the ducks are always clean. They love to roost though and can fly pretty well. So trading in dirty water to low roosting poles is a trade I would do any day!
When I first brought them home, they would all lay eggs in the same area. That is three ducks/hens all laying a nest in one area. After a bit, one hen adopted all of the eggs and went broody (it took about a week for all three to get a very sizable nest). Now I have two ducks/hens laying eggs in another area now and the other hen is about to go broody (I believe in about another week or so when they have a few more eggs). So, you can believe how prolific these birds are! They are also amazing mothers and will frequently adopt abandoned eggs or nests that they find (like I have one that is trying to go broody on a Sebright's nest she found with six eggs in it and another that tries to adopt turkey eggs that she find laying in the yard). My ratios right now is one drake to three hens and my fertility rate is 100% (this year I have not had a single infertile egg). I would say one drake to every five ducks/hens would be good. And the drakes are a little meaner when doing the deed. They will chase after the female, grab her by the neck then proceed. When they start to miss feathers on the backs of their heads (like when I first got them, they were paired up one to one so a single duck/hen got all of the abuse from him) I know I need more females or to separate the drake.
The only con I could list is that they love to wander around the yard more than the chickens and turkeys. I will go outside and they will be up in the front yard just doing duck things. Of course, this is unacceptable because the road is in the front yard. So containing these ducks may have to be done by certain farms.