Black mamba vs Gaboon viper: Which is Africa's deadliest snake on the basis of venom, size, habitat and more

Time of India

25-06-2025

Africa harbours some of the world's most lethal snakes, and two of its most formidable are the black mamba and the Gaboon viper. Though both inhabit parts of Sub-Saharan Africa, they differ greatly in appearance, behaviour, and how they kill.
The black mamba is feared for its speed, aggression, and extremely fast-acting neurotoxic venom, while the Gaboon viper relies on camouflage and delivers massive doses of potent cytotoxins with the longest fangs in the snake world. This article compares the two in detail—analysing their hunting methods, venom effects, and threat to humans—to reveal which of these African giants is deadlier.
Black mamba and Gaboon viper: Key differences explained
Category
Gaboon Viper
Black Mamba
Physical Size
Thick-bodied; up to 7 feet long and 45 pounds; body width can reach 6 inches
Long and slender; can grow up to 14 feet but only 4.5 pounds; built for speed and agility
Venom Type
Cytotoxic – destroys tissue, causes local damage; injects up to 600mg per bite
Neurotoxic – attacks nervous system; injects up to 120mg per bite, enough to kill 10–20 people
Venom Potency
Highest venom yield per bite of any snake (up to 2,400mg in glands)
Extremely potent venom; can kill in under an hour if untreated; 100% envenomation rate
Fangs
Longest venomous snake fangs: up to 2.2 inches; penetrates deeply and holds prey
Shorter fangs: 0.5–0.8 inches; delivers venom through rapid multiple bites
Camouflage and Build
Broad head with leaf-like shape and horns on snout; blends with forest floor; slow, non-aggressive
Slender, olive/gray/brown body; black interior mouth; fast and aggressive when provoked
Habitat
Prefers rainforests and dense woodlands; low visibility increases risk of accidental bites
Found in savannahs, rocky hills, and open woodlands; wider range increases human encounters
Lifespan (Wild/Captive)
Lives around 10 years in the wild; up to 20 years in captivity
Lives around 11 years in the wild; can exceed 20 years in captivity
Black mamba vs Gaboon viper
Physical size
The Gaboon viper is a stout-bodied snake, with a reputation for being heavily built and very short compared to the black mamba.
The longest it will get is 7 feet long, and at maximum weight, it reaches 45 pounds, with its body so wide that it will be about 6 inches in diameter.
Conversely, the black mamba is designed for speed and agility. While it is much lighter—usually weighing no more than 4.5 pounds—it has the potential to reach a whopping 14 feet in length, one of the longest venomous snakes globally. Its slender, aerodynamic body enhances its high-speed attacks and quick movement.
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by Taboola
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Venom
Both are fatal, but their venoms act differently. The Gaboon viper's venom is cytotoxic, or tissue-destroying, causing extreme local damage. Surprisingly, it injects more venom per bite than any other species—up to 600 milligrams per strike and storing up to 2,400 milligrams in its venom glands.
The black mamba, however, yields neurotoxic venom, which targets the nervous system. It delivers as much as 120 milligrams with each bite, but its venom is so toxic that it can kill 10–20 individuals with one dose.
Death can result in less than an hour without immediate treatment. Worse still, black mambas tend to bite repeatedly and achieve a 100% rate of envenoming, meaning almost any bite carries venom.
Fangs
Gaboon viper has the longest fangs among venomous snakes, with up to 2.2 inches in length. Long fangs enable deep penetration and maximum venom injection while biting and holding prey.
Black mamba's fangs, while much shorter at around 0.5 to 0.8 inches, are still functional.
Coupled with their quick, multiple-strike nature, they ensure efficient delivery of venom.
Morphology and camouflage
The Gaboon viper is a camouflage expert. Its dead-leaf-like coloration helps it hide in the dark forest floor without anyone noticing. The flat, leaf-like head and diminutive horns between the nostrils also contribute to the camouflage. It is basically a non-aggressive animal and only bites by mistake—mostly when human beings tread on it unconsciously.
The black mamba, contrary to its name, is seldom black. It is often olive, gray, or brown, with a particular inky-black lining of its mouth, which it presents as a threat. Although not a cobra, it can also spread its neck slightly into a hood-like form. Unlike the viper, it is also speed-offering, attacking when threatened, and likely to pursue or trap an apparent threat.
Habitat and distribution
They are both indigenous to Sub-Saharan Africa, but they occupy different habitats.
Gaboon viper usually inhabits rainforests and dense woods, whereas black mamba inhabits savannahs, rocky hills, and open woods, allowing it a wider spread geographical habitat and more encounters with humans.
Lifespan
In the wild, Gaboon vipers live for about 10 years, but can live as long as 20 years in captivity under favorable care. Black mambas live a bit longer in the wild, with an average of 11 years, and can reach 20 years or more in captivity.
Black mamba vs Gaboon Viper: Which snake is more deadly to humans
Both snakes are deadly to a human, but the black mamba is unequivocally more dangerous to humans. Although the Gaboon viper yields more venom, it is less aggressive, more shy, and less likely to bite until provoked. The black mamba, on the other hand, is extremely territorial, swift, and able to inflict several lethal bites with neurotoxic venom that takes effect in a hurry. It kills within 30 minutes to one hour, and bites that remain untreated carry a 90–100% chance of death.
Because of its potency, aggression, and willingness to attack, the black mamba is considered the most venomous snake in Africa—and perhaps the planet.
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