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Sibynophis collaris
Range
India, Nepal, Bhutan, Bangladesh, Myanmar, Thailand, Laos, Vietnam, West Malaysia and China
Size
Total length 737mm; tail 241mm
The common many-toothed snake, also called the collared black-headed snake, is a colubrid endemic to South and East Asia. The dorsal scales are smooth, without apical pits, in 17 rows, and the lower parts are yellowish, each belly scale with an outer black spot or streak. One measured animal was 737mm long with a 241mm tail (Boulenger, as reported on Wikipedia).
Its type locality is the Khasi Hills in India, and the range extends through Nepal, Bhutan, Bangladesh, Myanmar and Southeast Asia to China. The sources opened give nothing on habitat, diet or breeding, so none is stated.