I love these ducks, they were the first I had bought. They have big eggs, some have double yolks. They can produce 3 different types of ducklings with their genes. They can produce Black Swedish, Splash Swedish and Blue Swedish Ducklings. I highly recommend them for pets, eggs and breeding.
:(Sounds to me like Black swedish, they are a great breed . Your knob head one has a crested mutation, NOT A BAD MUTATION they are beautiful when they grow up! I had a Black Swedish duck but it died when it was 4 weeks old:(