I have had five nests eaten this year....I have NO idea what is eating them....everyone in my neighborhood has a different opinion.....raccoons, skunks, muskrats, cats.... but I have NEVER seen any of these animals in my neighborhood, except muskrats and cats, of course! Someone said I should try putting mothballs around my yard. Any comments on that? I was thinking about getting nesting boxes, but I heard they are suppose to be off the ground, and the ducks I want can't fly. Hmmmm..... Any comments? Thanks!