Rhabdophis himalayanus

The orange-collared keelback is a rear-fanged snake, as are others in its genus. The toxicity of its venom is not known, but it overpowers its prey quickly. It may reach 83cm in total length, with a 20cm tail. It is olive above with small dark spots and two lengthwise series of small whitish spots or narrow crossbars (Wikipedia, general species account).

Behind the head there is an orange or yellow collar, usually interrupted on the midline, followed by a blackish blotch on the nape. The upper lip scales are yellowish with black sutures and the belly is yellowish speckled with brown or black, or entirely greyish olive or blackish. Its range includes Nepal, Bhutan, north-east India and Bangladesh. Nothing on diet or habitat was found.