You said the Muscovy ducks are the "meat" ducks. Do you prepare and consume them in the same way you would a chicken? Do you roast them? Will duck fry up like chicken? How do you consume them? Do they have a lot of fat? Many restaurants are deep frying in duck fat now. It is supposed to create a unique flavor in fried foods.
I noticed you called the Muscovy ducks "South American Perching Birds". When we lived in East Texas, We had an eight acre pond with a lot of Muscovy ducks. We didn't raise them, they were just there. My wife would put bird feeders on tall poles to prevent the squirrels from getting to the feeders. The Muscovy's would fly up to the feeders and perch to eat the bird food. Their weight would bend the feeders to the ground or break them off. The only thing that controlled the Muscovy population were the alligators in the pond. We had at least one twelve foot gator and a duck was just a snack.