Excellent soup-to-nuts guide to raising ducks successfully. I built a predator-proof duck coop following his drawings, and never lost a duck to fox, raccoon, possum, nor snake when they were in the coop.
I will note that once you start keeping ducks outside, they are vulnerable to hawks and other predators during the day when they are out of the coop. I protected my ducks before they began to fly by putting netting over their enclosure. Mine were mallards, and once they started to fly, all bets are off. I made a duck island for them on the pond at our house, but once they are living on their own, unprotected, you will lose some unless you continue to put them in the coop at night, which is possible if you train them right from the start. Mine were very willing to come back to the barn when I whistled for them because (I assume) they associated me with food. Having ducks fly to you when you whistle is a cool experience, since mallards are fundamentally wild birds.