Fawn Runner ducks are a breed of runner duck that is fawn and white in color. They are a relatively light duck, weighing only 3-5 pounds, with the males weighing more than the females. Runner ducks are highly mobile, and appear to stand upright when compared to other non-runner duck breeds. They are useful for weed and pest control, as they're excellent foragers and their light weight allows them to avoid trampling vegetation.