Daboia siamensis

Daboia siamensis (Common name: eastern Russell's viper, Siamese Russell's viper, more) is a venomous viper species, which is endemic to parts of Southeast Asia, southern China and Taiwan. It was formerly considered to be a subspecies of "Daboia russelii" (as "Daboia russelli siamensis"), but was elevated to species status in 2007.
Description.
Dorsally, the color pattern is the same as that of "D. russelii", except that the color is more grayish or olive, with small spots between the large spot rows. The venter is suffused with gray posteriorly.
Common names.
Common names for "D. siamensis" include eastern Russell's viper and Siamese Russell's viper.
Previously, other common names were used to describe subspecies that are now part of the synonymy of this species: Indonesian Russell's viper for "limitis", and Formosan Russell's viper for "formosensis".
Geographic range.
"Daboia siamensis" is found in Myanmar, Thailand, Cambodia, China (Guangxi, Guangdong), Taiwan and Indonesia (Endeh, Flores, east Java, Komodo, Lomblen Islands).
Brown (1973) mentions that "D. siamensis" can also found in Vietnam, Laos and on the Indonesian island of Sumatra. Ditmars (1937) reportedly received a specimen from Sumatra as well. However, its distribution in the Indonesian archipelago is still being elucidated.
Venom.
A monovalent antivenin, called "Russell's Viper Antivenin", is made in Thailand by the Thai Red Cross to counteract the venom of this species.And also from pharmaceutical factory myanmar(burma)