The Masked Duck (Nomonyx dominicus) ranges from Texas and West Indies to South America. Its place is around low aquatic vegetation, mudbars, and shallow water. Its measures are 33 cm (13 inches) heights and 375 g in weights.
Its crown and face are black. Neck and chest are chestnut. Mantle scalloped with black and rusty. Below cinnamons, spotted with black on sides and flanks. Bill bright blue and legs grayish. Its diet is based on plants and invertebrates.