Russell's viper (Daboia russelii) is one of the most dangerous snakes in the world. It is deadly venomous and kills many people each year. Snakebite is a very big problem in India, where this snake lives in huge numbers. Russell's viper has great camouflage and often visit fields and plantations. People step on it and then the snake defends itself. Populations from Southeastern Asia are now classified as Siamese Russell's viper (Daboia siamensis). Compared to other big vipers, such as Puff adder or Gaboon viper, this species is more agile.