Gloydius huangi

Gloydius huangi, the Lancang Plateau viper, is a medium-sized pit viper from Tibet, growing up to 53.2 cm. The common name refers to the river basin where it lives, suggested to promote its conservation, and the species is named for herpetologist Song Huang of Huangshan University. (The Reptile Database; Wikipedia, general species account)

It has an oval or spoon-shaped head and a blunt snout, with matte scales and a beige to peachy base colour with many grey or black patches, including a distinct C-shaped patch on the head. It prefers hot, dry areas at about 3,000–3,300 m and was previously described as Gloydius strauchi, from which its larger size and pattern distinguish it. (Wikipedia, general species account)