A pair of heavy Pieds may fail to produce any heavy Pieds. The reverse is also true. The Fallow is a red eyed brown cockatiel. This trait is also an autosomal recessive. As in the Cinnamon, the shade of brown is variable.
Fallows are most often lighter than Cinnamons.
Again as in the Cinnamon, cocks are on the average darker than hens. Some Fallows are two toned. The White Faced mutation is the most recent autosomal recessive mutation to become well-established. This factor deletes the yellow suffusion and orange cheek patches. This yields a charcoal colored white faced cockatiel.