The Gaboon viper (Bitis gabonica) is a venomous snake native to the rainforests and savannas of central and western Africa. It's the largest viper in Africa, weighing up to 18 lbs and growing to 7 ft long. The Gaboon viper has several distinctive features, including: Fangs** The longest of any snake, measuring up to 2 inches. Body** Stout and heavy with a velvet-like appearance. Coloration** Bold patterns of brown, purple, and buff rectangles and triangles. | Critters Of The World & Southern Out