Males have black plumage all over except for the white crissum. The crissum (the area around the cloaca) is yellow with black barring. The contrasting white crissum is the most noticeable feature on females. When it does run, its tail is generally held upward, exposing its buffy crissum. This barring extends down to the abdomen and legs, while the crissum is spotted black. The lower belly and crissum (the undertail coverts surrounding the cloaca) is white.