Muscovies are certainly not stupid or slow. They are very smart & quick birds, I have a 13-ish lb drake that will rush right past me like a rocket and goes even faster if he gets an urge to breed one of his girls. They know where they can escape and they see EVEYTHING when they're trying to be...
I am not sure that these Muscovies are "wild born" ducks, the OP said in a previous thread about these same birds...
"Many of the ducks have what appears to be a portion of the wing that either pokes-up in the air or droops down. Looking at the photos here, I don't see any of y'alls ducks with...
Jesus That thing might get you some ducks but you may have to put all their butts back in place after you get them home!!! I almost jumped just watching it, I couldnt imagine getting caught with it!
Maybe you can get some friends to help you net them at night with a large fishing net, like...