The toxicity of its venom is not known, but it overpowers its prey quickly.

Dorsally it is olive with small dark spots and two longitudinal series of small whitish spots or narrow crossbars.

Behind the head there is an orange or yellow collar, usually interrupted on the midline, followed by a blackish blotch on the nape.

Ventrally it is yellowish, speckled with brown or black, or entirely grayish olive or blackish.

[2] India (Sikkim, Assam; Arunachal Pradesh (Siddi (=Gandhigram), Miao - Changlang district, Chimpu, Itanagar - Papum Pare district, Pasighat, Boleng - East Siang district) ), Bhutan, Bangladesh, Nepal, N Myanmar (Burma), China (Yunnan, Yizang/Tibet).