With the aliases of Grey Langur and Fashiye Langur, it belongs to the Cercopithecidae Family of Primates order. Its scientific name is Presbytis phayrei (Latin), or Semnopithecus phayrei (English).
It body length is 55 to 71 centimeters, tail length 60 to 80 centimeters and body weight 7.2 to 10.5 kilograms. It is wrapped with silver gray hair, with black cheek. The skin around the eyes and mouth is pale for the lack of pigment. Its four limbs are slender. Its coronal hair is light silver gray, like a crown when growing long. Its ventral side is misty gray or light white. Between eyebrows and forehead is comparatively long black hair, protruding forward just like black long eyebrows.
It inhabits in tropical and subtropical jungles, dwelling in groups of 10 to 30. Good at climbing and jumping, it has a certain moving route and seldom gets down to the ground. When startled they often flee in order. It feeds on young leaves, flowers and fruits, as well as bird ovas and birdies.
The stock on hand of this species now is 12,000 to 17,000 head, mainly distributed in the southwest of Yunnan Province.
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