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.