They have sharp long claw/toe nails. Can fly (females better than males), and are the quiet ducks. We just hatched our first here. Enjoy your new ducks!
Yeah, the claws are something else especially on the drakes! I don't think their is much else beyond typical duck care... i know i haven't done anything "special" with ours.. i have 8.. all full flight, free ranged!
Of coarse you'll be back in a bit with the infamous Muscovy question, trying to figure out if you have boys or girls!
They are great foragers but those claws are dangerous.They act more like dogs than ducks and its imposable to tell if they are boys or girls. Congrats on the freebies!!!