Adult Male:
Winter Plumage: The area in front of the eye, cheeks, ears, and sides of the head are black. There is a pale gray eyebrow stripe. The upperparts are black with gray feather edges, often with a rufous streak on the back. The innermost wing coverts are white. The chin and throat are white. The remaining underparts are pale gray, with a slight rufous wash on the breast.
Summer Plumage: The gray feather edges gradually wear away. In summer, the upperparts are almost entirely black, while the underparts are white.
Adult Female:
The upperparts are pale brown, with dark brown streaks down the center of the feathers. The tail is rufous-brown. The underparts are pale rufous-brown, with a pale white chin and throat.
Eyes are dark brown. The beak and legs are black.
Measurements:
- Wing: 60 – 72 mm
- Tail: 55 – 60 mm
- Tarsus (leg): 20 – 21 mm
- Beak: 10 – 11 mm
Distribution:
- The species is distributed in northern Myanmar, southern China, and Indochina.
- In Vietnam, it is commonly found in hilly and mountainous areas with dense shrubs, from the Vietnam-China border to Di Linh.