will my ducks fly

My muscovy girls have had their wings clipped since their moult into grown up feathers, as I know that muscovies can fly very well! Vic and Bob the cayugas have very little wings in relation to their body size so not worried there, and the runners I doubt can fly either but.......................I am a bit worried about my 2 khaki cambells? they are still getting the last of their adult feathers but would they fly off??? I have refrained from catching them as they are so timid, (as opposed to the muscovies who creep up behind me and squat  little hussies  )
should i clip them or will they think of my garden as home?

I am looking forward to the muscovies flying next year when their feathers grow out, although I did wonder the other day how they got from one side of their to the other so quickly!