It can be easily identified by checking very slender body and long tail covered with yellow-white bands. Also it is similar to appearance with sister species Scarce Bridal Snake (D. gracilis) but can be identified with certainty by checking mid body rows (13 in D. nympha and 15 in D. gracilis).
Average length- 40cm.
Maximum length- 52cm.
Body slender with smooth & shiny scales of brown or blackish-brown color. Yellow or white bands present on whole dorsal body starting from neck; gradually becomes faint on posterior. Majority of scales of bands with brown-black dots. Bands on top occupies 2-4 scales and become broad on flank, often leave triangular spots touching belly.
Belly glossy white without any pattern. Subcaudal scales paired in zig-zag manner.
Head slightly flattened, slightly broader than neck and covered with smooth and glossy scales. A clear white or yellow collar present in all life forms. Upper head color similar to dorsal and upper lip color white or yellowish. Large eyes with vertically elliptical pupil.
Thin, long and slender tail ends with pointed tip. Bands found in dorsal region continues on tail in faint form.