A Brown-spotted Pit Viper has strongly keeled dorsal  scales and a dull green base colour with brown spots, a diffuse thin white line near its belly, and a brown prehensile tail. Its eyes are a yellowish golden-copper with vertically elliptical pupils.

VENOMOUS! This snake has potentially lethal envenoming. It carries a hemotoxic venom and though envenomation has an unknown lethality rate, if left untreated lethal potential cannot be excluded. Its bite may lead to severe swelling, bruising, blistering and necrosis. Thailand Antivenom Code: SAsTRC01