The Gaboon viper (Bitis gabonica), also called the Gaboon adder, is a viper species found in the rainforests and savannas of sub-Saharan Africa. Like all other vipers, it is venomous. It is the largest member of the genus Bitis, and it has the longest fangs of any venomous snake – up to 2 inches (5 cm) in length – and the highest venom yield of any snake. No subspecies are recognized. Adults are typically 125–155 cm (4 to 5 ft) in total length (body and tail) with a maximum total length of 205 cm (81 in) for a specimen collected in Sierra Leone. The sexes may be distinguished by the length of the tail in relation to the total length of the body: around 12% for males and 6% for females. Adults, especially females, are very heavy and stout. The color pattern is striking in the open, but in nature, typically among dead leaves under trees, it provides a high degree of camouflage; in a well-kept cage with a suitable base of dried leaves, overlooking several fully exposed specimens completely is easy.[citation needed] The pattern consists of a series of pale, subrectangular blotches running down the center of the back, interspaced with dark, yellow-edged, hourglass markings. The flanks have a series of fawn or brown rhomboidal shapes, with light vertical central bars. The belly is pale with irregular brown or black blotches. The head is white or cream with a fine, dark central line, black spots on the rear corners, and a dark blue-black triangle behind and below each eye. The iris colour is cream, yellow-white, orange, or silvery. (Source: Wikipedia.org, CC BY-SA)