High Quality Content by WIKIPEDIA articles! Bitis gabonica is a venomous viper species found in the rainforests and savannas of Sub-Saharan Africa. This is not only the largest member of the genus Bitis, but also the world`s heaviest viperid and it has the longest fangs (up to 2 inches),and the highest venom yield of any venomous snake. Two subspecies are currently recognized, including the nominate race described here.