 The majority of the largest family of snakes, the "Colubridae" have 15, 17 or 19 rows of scales.The maximum number of rows are in mid-body and they reduce in count towards the head and on the tail.The various scales on a snake's head and body are indicated in the following paragraphs with annotated photographs of Buff-striped Keelback "Amphiesma stolata", a common grass-snake of South Asia and a member of Colubridae, the largest snake family.