Okay, I just went to google them and now I'm wondering if the eggs I have are in fact Muscovy's. To be honest, the guy I got them from had a LOT of fowl but didn't seem overly knowledgeable about what he had. For example,
he had a whole pen of "black sexings" which he proudly informed me, were never exposed to other roosters because "he won't stand for mixed breeds around his place". He tried to get me to buy some of their eggs so I could hatch out some "black sexings" of my own.
Also, he didn't technically give me Muscovy eggs - he gave me Muskogee eggs
Anyways....the ducks I saw at his place look nothing like the images of Mucovy's I just saw on Google. His ducks were mostly white and quite small. By comparison the Wiki on Muskovy's describes them as predominantly black and white with the males being quite large. Also, the image shows a lot of red on the male's face, I don't recall seeing that on the face of the drake at this guy's place.
I guess I will have to keep an eye on them via candling to determine when they go into lockdown then....