A Siamese Russell's Viper. It has a pinkish-brown body with rows of dark brown, often mango-shaped spots, that are delineated with a black inner edge and a somewhat thinner white outer edge, and smaller dark brown spots scattered between them.

Occasionally, there may be blotches with a different shape, seemingly as if two spots are merged together, forming a larger blotch and outline, usually with an indistinguishable shape.

VENOMOUS! This snake is deadly! It is very aggressive and easily irritated!  It carries a strong tissue-destructive and hemotoxic venom, and severe envenoming from its bite is potentially lethal. Besides this, its bite may cause local pain, swelling, blistering, necrosis and coagulopathy, bleeding, and renal failure. All cases should be treated as urgent and potentially lethal. Thailand Antivenom Code: SAsTRC05