Crested Buff Ducks are characterized by having crests that are globular in form, relatively but not excessively large in size and free from divisions or flatness. Since there is a lethal gene involved in producing crested ducks, special mating considerations must be made. They have an even shade of rich fawn-buff plumage, with the exception of the head and upper portion of the neck in drakes, which varies from rich fawn-buff to seal-brown.