A king cobra would win a fight against a taipan. The taipan has much deadlier venom, but that's not going to save it against the great amount of experience that king cobras have in attacking snakes. Neither snake lives in the same area of the world and they're from different families.
It is no doubt that king cobras do occasionally consume large prey such as monitor lizards or even pythons. One cannot but wonder how the snake is able to make dynamic decisions and evaluate the risks and gains of pursuing prey such as a rock python, which can potentially kill the cobra by constricting it.
A black mamba would win a fight against an inland taipan because it's larger and far more aggressive than the other snake. Still, when we talk about the “winner” of a fight between two of the deadliest animals alive, we can't truly say one will survive and the other won't.
Though a snake-eating species, King Cobra is not fully immune to snake venoms, as it can be envenomed and killed by another King Cobra or venomous snakes.
The saw-scaled viper, Echis carinatus, is considered the deadliest snake in the world, according to Britannica. This type of snake is said to be responsible for "more human deaths than all other snake species combined." The venom of the saw-scaled viper is not as lethal as other snakes, but it is far more aggressive.
The black mamba, for example, injects up to 12 times the lethal dose for humans in each bite and may bite as many as 12 times in a single attack. This mamba has the fastest-acting venom of any snake, but humans are much larger than its usual prey so it still takes 20 minutes for you to die.
Australian Brown Snake
Its venom is reputed to be the second most toxic in the world. They cause the most snakebite deaths in Australia - 1/14,000 of an ounce of this venom is enough to kill a person.
The inland taipan has very few predators in the wild. However, the king brown snake and the perentie monitor lizard are both known to feed on baby taipans and juveniles.
(The honey badger has both: molecular defenses against cobra venom's neurotoxins, and loose, thick skin to help it avoid getting struck in the first place.)
The antivenom specific to King Cobra, i.e., Ophiophagus hannah Monovalent Antivenom (OhMAV) produced in Thailand was administered in eight out of the nine cases, indicated by the onset of neurological manifestation.
"This particular cobra was older and larger than the mamba," Charlotte Arthun explains over on the Marabata blog. "While the mamba put up a fight, continually striking at the cobra, the cobra won the battle with its superior size and strength, eventually eating the mamba."
An anaconda would win a fight against a king cobra. This outcome assumes that both of these creatures met in an open area that doesn't allow an ambush to happen.
TAIPAN ANTIVENOM is prepared from the plasma of horses immunised with the venom of the coastal taipan snake (Oxyuranus scutellatus). Each vial contains 12,000 units of antivenom which has been standardised to neutralise in vitro, the average yield of venom from the taipan.
What predator would even try to attack a cobra? The snake's biggest enemy is the mongoose, which is quick enough to dart in and bite the back of the cobra's neck before the snake can defend itself.
2. King Cobras Fear the Mongoose. Mongooses are noted for their audacious attacks on highly venomous snakes, such as king cobras. The mongoose preys on the king cobra, and they do so very successfully.
The main predator to the king cobra is the mongoose because the mongoose is immune to its venom. However, mongooses rarely attack king cobras unless they have to. Venom from a king cobra can kill a human in around 45 minutes.
The mongoose is the best-known enemy of the cobra. According to Cobras.org, mongooses have thick fur to protect against cobra fangs and often defeat cobras in fights using their speed and agility. They can bite the cobra's back before the snake can defend itself. Cobras are also threatened from other snakes and humans.
So far scientists fully understand venom resistance in only four mammals - mongooses, honey badgers, hedgehogs and pigs - as well as several snakes. The golden poison frog is one of the most toxic animals on Earth, deadly to almost all animals except one.
While they may not die from a black mamba bite, they will often lose consciousness for minutes after envenomation. Their prey may sneak away or bite again. Thus, the honey badger must finish the black mamba before succumbing to the venom for a short time.
Although the most venomous and a capable striker, in contrast to the coastal taipan which many experts cite as an extremely dangerous snake due to its behavior when it encounters humans, the inland taipan is usually a quite shy and reclusive snake, with a placid disposition, and prefers to escape from trouble.
Will a taipan chase you? They are extremely nervous and alert snakes, and any movement near them is likely to trigger an attack. Like any snake the Taipan prefers to avoid conflict and will quietly slip away if given the chance, however if surprised or cornered it will ferociously defend itself.
It typically only takes 30-45 minutes for an Inland Taipan bite to kill a fully grown human. Given the fact that these snakes only live in remote locations, it is unlikely that you will survive the attack and reach medical attention in time.
The “Big 4” snakes are currently Russell's viper, common krait, Indian cobra, and Indian saw-scaled viper. Russell's vipers are considered the deadliest because they bite the most people. About 43% of all medically significant snakebites in India came from this snake.
3. Coastal Taipan. The coastal taipan is found in coastal regions of Northern and Eastern Australia and the nearby island of New Guinea. It produces venom that is almost identical to that of the inland taipan – considered to be the most venomous snake in the world.