Blackbelly Worm-eating Snake

The blackbelly worm-eating snake, also called the Darjeeling slender snake, is a colubrid endemic to Asia. The belly is black or dark brown, as is the back, which may have lighter lengthwise streaks. The specific name fuscum is Latin for dusky. The dorsal scales are in 13 rows, and males have keeled scales on the sides in the anal region (Wikipedia, general species account).

Adults may reach 51cm in total length, with a tail of 6cm. It is found in Nepal and India, and possibly also in Bhutan, though the Reptile Database lists Bhutan. The sources opened give nothing on habitat, diet or breeding.