Very large, muscular. Scales smooth, dull. Head long, flat-sided with black mouth. Body dirt grey, sometimes olive. Black blotches on pale grey-green belly.
Diurnal. Terrestrial but will climb trees. Eats small mammals, birds. Lays 12 - 18 large eggs in summer.
Rears forebody, gapes widely, hisses and spreads narrow hood in defence. Delivers many quick bites. Venom potent neurotoxin leading to rapid death from paralysis if untreated.
Namibia, Botswana, Zimbabwe, east coast of Souht Africa.