Xenochrophis cerasogaster

The painted keelback, sometimes called the dark-bellied marsh snake, is a colubrid snake found in Pakistan, Nepal, Bangladesh and India (Assam, Uttar Pradesh, West Bengal). The scales are strongly keeled, in 19 rows, with 140–151 belly scales and 60–70 under-tail scales (Wikipedia, general species account).

It is brown above, with or without darker spots and a more or less distinct paler band along the side. The account used here gives no information on size, habitat, diet or breeding.