They are a medium sized duck with a crest (pouf of feathers) on the head. Not all ducklings will have a crest, and if both parents are crested 25% will not hatch, 25% will have no crests, and 50% will have nice big (or medium) crests. Social ducks, easy to tame. Good pets for kids. They do not breed true, you will get some blue, black, splash & silver.