Saw-scaled Viper is the only Echis species found in India and member of famous Big Four. This is also the smallest Viperidae member with an average size of 30cm only. Indian Saw Scaled Viper's population ends eastwards in Odisha and West Bengal states with eastern-most boundary of the genus Echis. It can be identified by carefully checking very dry looking body covered with rough scales, light color rounded patches on top which are surrounded by two wavy lines from head to posterior body. In deserts and semi-deserts of India this is perhaps the most common venomous snake and so the most important medically significant reptile for deserts and semi-deserts.