I've never clipped wings. The ducks do like to do a little circuit, usually once a day in the mornings, to exercise their wings and keep the muscles strong, but that's really about all they do - take off, fly a circle over the house, and land - then they're done. The drakes really can't get off the ground. We have a pond that is maybe 100 yards from the chicken yard. If the winds are favorable, they like to fly down there to bathe. The drakes have to walk and if the winds are not conducive to flying, the ducks will waddle down there with them. I like knowing that in the event a predator was after them, that is an option they have - to take to the air to get away.