Haast was also bitten by a green mamba. Inside they find footprints and a green mamba snake. There is no evidence that the eastern green mamba migrates. The eastern green mamba has few natural predators. Like the western green mamba, the neck may be flattened. The neurotoxic nature of green mamba venom means an arterial tourniquet may be of benefit. The western green mamba is native to West Africa. All three species of green mamba are highly arboreal, alert, extremely quick, and agile. Other snakes in the area include the forest adder, black mamba, and the green mamba. The eastern green mamba is solitary, except during breeding season. Mortality rates are also higher among green mamba bite victims than with cobra bite victims. A shy and elusive species, the eastern green mamba is rarely seen. Current favorites in the Southern Province are Green Mamba and Mashombe Blue Jeans. The oldest recorded eastern green mamba was a captive specimen that lived for 18.8 years. Like all the other mambas, the western green mamba is a highly venomous elapid species.