The green cat snake, Boiga cyanea, is a species of nocturnal opisthoglyphous snake found in India (Sikkim, Darjeeling & Jalpaiguri in West Bengal, Assam, Arunachal Pradesh, Nicobar Islands), Vietnam, Laos, Cambodia, Thailand (incl. Phuket), Myanmar, West Malaysia, and parts of China (Yunnan).
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The Boiga cyanea, or Green Cat Snake, has a long body, head distinctly broader than neck, and large eyes with vertical pupil.