How dangerous are Savanna vine snakes?

Wikipedia is your friend: “Twig snakes are among the few rear-fanged colubrids whose bite is highly venomous and potentially fatal. read more

“Twig snakes are among the few rear-fanged colubrids whose bite is highly venomous and potentially fatal.[3] The venom is hemotoxic, and although its effects are very slow, and bites are rare, no antivenom has been developed and several fatalities (such as Robert Mertens) have occurred. read more

It is the largest of the continent's venomous snake species, with an average length of approximately 8.2 feet/ 2.5 meters. Black mambas are the fastest of all indigenous African snakes, and often strike more than once. read more