The White-headed langur[1], also called the Cat Ba langur, is an endangered species of langur native to Guangxi, China.
- White-headed langurs have slender, long bodies, long limbs, and very long tail (32 to 35 inches/82 to 89 cm).
- The tail is non-prehensile, but it helps them to balance while moving. Their feet and hands are black.
- Their hands have an underdeveloped thumb, and the feet have 5 fingers with an opposable big toe.
- Their bodies are covered in thick black to dark brown hair that is longer at the back, giving them the appearance of wearing a vest.
- A band of light gray hair begins at the lower back and extends to the outside of the thighs. Their shoulders and neck appear wrapped in a shawl of orange-yellow fur.