Green Keelback

The green keelback, or lead keelback, is a non-venomous colubrid native to parts of the Indian subcontinent, distributed in peninsular India, especially in hilly landscapes. It is stout and viper-like in build and about 2 feet (61 cm) long including the tail when fully grown. The back scales are strongly keeled. Adults are dull green above, uniform or with traces of black markings, and the belly is whitish, yellow or lead-coloured (Wikipedia, general species account).

Young snakes show an inverted black V-mark on the neck with bright yellow or orange between it and a smaller second mark, and a black stripe from the eye to the angle of the mouth. The Reptile Database lists Madhya Pradesh, Maharashtra, Kerala, Tamil Nadu, Andhra Pradesh, Karnataka, Gujarat, Telangana and Odisha.