Pseudagkistrodon

 Pseudagkistrodon rudis, also known as red keelback, false habu, and false viper, is a species of snake in the family Colubridae . It is found in southwest, south, and east China and in Taiwan. One subspecies, "Pseudagkistrodon rudis multiprefrontalis" from Sichuan, is recognized, in addition to the nominotypical one.
Description.
"Pseudagkistrodon rudis" appears to mimic vipers, and the head takes a triangular shape when the snake takes a defensive position. 
The species grows to in total length. The head is broad and distinct from the neck. The dorsum is brown to grey brown, sometimes tinted with bronze, and interrupted by dark patterns of variable in size, disposition and intensity of pigmentation.
Female snakes give birth to 12–27 young per litter in late summer and autumn. The newly hatched young measure cm in total length.
Habitat and conservation.
"Pseudagkistrodon rudis" is a common species that inhabits montane meadows, riparian areas of brooks, valleys, road sides, shrubs, and rock piles. Its altitudinal range is above sea level.
The species is traded in significant numbers, which might present a localized threat. However, the overall population of this widespread species is stable and its conservation status is assessed as "Least Concern".