It can be identified by checking cream color bars on dark brown ground color on half of fore body. Often confused with Russell's Kukri due to similar head markings. It looks very close to Günther's Racer (Coluber gacilis) which is found in dry parts of western India and does not overlap with former. The main morphological difference between Nagarjun Sagar Racer and Günther's Racer are: Number of mid body rows (19 in C. bholanathi and 21 in C. gracilis), rostral two times broader than high in C. bholanathi while as broad as high in C. gracilis, no pattern on posterior body and tail in C. bholanathi while discontinuous series of dark patches on posterior half of C. gracilis.
Average length- 70cm.
Maximum length- 119cm.
Body slender with subequal and smooth scales. Dorsal color dark brown which become faint on moving towards posterior body. Light grayish-brown color bars with black margin starts from neck or posterior of neck and remain interconnected with each other on side dorsals by leaving triangular shaped patches near belly. These bars become faint on mid body and completely absent on posterior. Apart from this reddish ting exist on mid body.
Belly yellowish with dark patches on the edge of majority of ventrals. Subcaudal scales paired in zig-zag manner.
Head flattened, pointed with shiny smooth scales, clearly broader than neck. Large eyes with rounded pupil. Ground color of head creamy brown with number of irregular shaped markings of dark brown, margined by black. One black streak start from lower of eyes and reach to posterior lip. One dark brown patch start from temporal and reach to posterior lower temporal. Parietal markings variable; usually with a belt joining eyes followed by more or less broken V shaped marking starting from parietals and broadens at the end of head. Underside of head yellowish-white with blackish patches on outer scales specially in infralabials and genials.
Long and thin tail typically like other racer snakes with a pointed tip. Color patternless brown with reddish tint.