Oligodon juglandifer
Range
North-eastern India (Sikkim, Meghalaya, Darjeeling, West Bengal); Reptile Database also lists Bhutan
The walnut kukri snake is a snake found in north-eastern India. The Reptile Database lists Sikkim, Meghalaya, Darjeeling and West Bengal in India, and also Bhutan (Wikipedia and Reptile Database, general species account).
That one-line account is the only source opened for it. No description, size, habitat, diet or breeding information was found, so none is stated, and the entry is kept as short as the evidence allows.