Viper species found in the rainforests and savannas of sub-Saharan Africa. Like all vipers, it is venomous. It is the largest member of the genus Bitis, and it has the longest fangs – up to 2 inches in length (5 cm) – and the second highest venom yield of any snake next to the King cobra.
The snake’s common names include Gaboon viper, butterfly adder, forest puff adder, whisper, swampjack, and Gaboon adder.
Originally a name given by the Portuguese, Gabon (Gabão) refers to the estuary on which the town of Libreville was built, in Gabon, and to a narrow strip of territory on either bank of this arm of the sea. As of 1909, Gaboon referred to the northern portion of French Congo, south of the Equator and lying between the Atlantic Ocean and 12°E longitude.