10 Rattlesnake
The only snake from the Americas on the list, the
Rattlesnake is easily identifiable by the tell tale rattle on
the end of its tail. They are actually a part of the Pit Viper
family, and are capable of striking at up to 2/3rd their
body length. The Eastern Diamondback in considered the
most venomous species in North America. Surprisingly,
juveniles are considered more dangerous than adults,
due to their inability to control the amount of venom
injected. Most species of rattlesnakes have hemotoxic
venom, destroying tissue, degenerating organs and
causing coagulopathy (disrupted blood clotting). Some
degree of permanent scarring is very likely in the event of
a venomous bite, even with prompt, effective treatment,
and can lead to the loss of a limb or death. Difficulty
breathing, paralysis, drooling and massive hemorrhaging
are also common symptoms. Thus, a rattlesnake bite is
always a potentially fatal injury. Untreated rattlesnake
bites, especially from larger species, are very often fatal.
However, antivenin, when applied in time, reduces the
death rate to less than 4%

9 Death Adder
The appropriately named Death Adder is found in
Australia and New Guinea. They actually hunt and kill
other snakes, including some on this list, usually via
ambush. Death Adders look quite similar to vipers, in that
they have triangular shaped heads and short, squat
bodies. They typically inject around 40-100mg of venom
with an LD of 0.4mg-0.5mg/kg. An untreated Death
Adder bite is one of the most dangerous in the world. The
venom is a neurotoxin. A bite causes paralysis and can
cause death within 6 hours, due to respiratory failure.
Symptoms generally peak within 24-48 hours. Antivenin
is very successful in treating a bite from a Death Adder,
particularly due to the relatively slow progression of
symptoms, but before its development, a Death Adder bite
had a fatality rate of 50%. With the quickest strike in the
world, a Death Adder can go from strike position to
striking and back again within 0.13 of a second.

8 Vipers
Vipers are found throughout most of the world, but
arguably the most venomous is the Saw Scaled Viper and
the Chain Viper, found primarily in the Middle East and
Central Asia, particularly India, China and South East
Asia. Vipers are quick tempered and generally nocturnal,
often active after rains. They are also very fast. Most of
these species have venom that cause symptoms that
begin with pain at the site of the bite, immediately
followed by swelling of the affected extremity. Bleeding is
a common symptom, especially from the gums. There is
a drop in blood pressure and the heart rate falls.
Blistering occurs at the site of the bite, developing along
the affected limb in severe cases. Necrosis is usually
superficial and limited to the muscles near the bite, but
may be severe in extreme cases. Vomiting and facial
swelling occurs in about one-third of all cases. Severe
pain may last for 2-4 weeks. Often, local swelling peaks
within 48-72 hours, involving the affected limb.
Discoloration may occur throughout the swollen area as
red blood cells and plasma leak into muscle tissue.
Death from septicaemia, respiratory or cardiac failure
may occur 1 to 14 days post-bite, or even later.

7 Philippine Cobra
Most species of Cobra would not make this list; however
the Philippine Cobra is the exception. Drop for drop, its
venom is the most deadly of all the Cobra species, and
they are capable of spitting it up to 3 metres. The venom
is a neurotoxin which affects cardiac and respiratory
function, and can cause neurotoxicity, respiratory
paralysis and death in thirty minutes. The bite causes
only minimal tissue damage. The neurotoxins interrupt
the transmission of nerve signals by binding to the neuro-
muscular junctions near the muscles. The symptoms
might include headache, nausea, vomiting, abdominal
pain, diarrhea, dizziness, collapse and convulsions.

6 Tiger Snake
Found in Australia, the Tiger snake has a very potent
neurotoxic venom. Death from a bite can occur within 30
minutes, but usually takes 6-24 hours. Prior to the
development of antivenin, the fatality rate from Tiger
snakes was 60-70%. Symptoms can include localized
pain in the foot and neck region, tingling, numbness and
sweating, followed by a fairly rapid onset of breathing
difficulties and paralysis. The Tiger snake will generally
flee if encountered, but can become aggressive when
cornered. It strikes with unerring accuracy.

5 Black Mamba
The feared Black Mamba is found throughout many parts
of the African continent. They are known to be highly
aggressive, and strike with deadly precision. They are
also the fastest land snake in the world, capable of
reaching speeds of up to 20km/h. These fearsome
snakes can strike up to 12 times in a row. A single bite is
capable of killing anywhere from 10-25 adults. The
venom is a fast acting neurotoxin. Its bite delivers about
100–120 mg of venom, on average; however, it can
deliver up to 400 mg. If the venom reaches a vein, 0.25
mg/kg is sufficient to kill a human in 50% of cases. The
initial symptom of the bite is local pain in the bite area,
although not as severe as snakes with hemotoxins. The
victim then experiences a tingling sensation in the mouth
and extremities, double vision, tunnel vision, severe
confusion, fever, excessive salivation (including foaming
of the mouth and nose) and pronounced ataxia (lack of
muscle control). If the victim does not receive medical
attention, symptoms rapidly progress to severe
abdominal pain, nausea and vomiting, pallor, shock,
nephrotoxicity, cardio toxicity and paralysis. Eventually,
the victim experiences convulsions, respiratory arrest,
coma and then death. Without antivenin, the mortality
rate is nearly 100%, among the highest of all venomous
snakes. Depending on the nature of the bite, death can
result at any time between 15 minutes and 3 hours.

4 Taipan
Another entry from Australia, the venom in a Taipan is
strong enough to kill up to 12,000 guinea pigs. The
venom clots the victim’s blood, blocking arteries or veins.
It is also highly neurotoxic. Before the advent of an
antivenin, there are no known survivors of a Taipan bite,
and death typically occurs within an hour. Even with
successful administration of antivenin, most victims will
have an extensive stay in intensive care. It has been
likened to the African Black Mamba in morphology,
ecology and behavior.

3 Blue Krait
The Malayan or Blue Krait is, by far, the most deadly of
this species. Found throughout South East Asia and
Indonesia, 50% of bites from the deadly Blue Krait are
fatal, even with the administration of antivenin. Kraits
hunt and kill other snakes, even cannibalizing other
Kraits. They are a nocturnal breed, and are more
aggressive under the cover of darkness. However, overall
they are quite timid and will often attempt to hide rather
than fight. The venom is a neurotoxin, 16 times more
potent than that of a Cobra. It quickly induces muscle
paralysis by preventing the ability of nerve endings to
properly release the chemical that sends the message to
the next nerve. This is followed by a period of massive
over excitation (cramps, tremors, spasms), which finally
tails off to paralysis. Fortunately, bites from Kraits are
rare due to their nocturnal nature. Before the
development of antivenin, the fatality rate was a
whopping 85%. Even if antivenin is administered in time,
you are far from assured survival. Death usually occurs
within 6-12 hours of a Krait bite. Even if patients make it
to a hospital, permanent coma and even brain death from
hypoxia may occur, given potentially long transport times
to get medical care.

2 Eastern Brown Snake
Don’t let the innocuous name of this snake fool you,
1/14,000 of an ounce of its venom is enough to kill an
adult human. Coming in a variety of species, the Eastern
Brown snake is the most venomous. Unfortunately, its
preferred habitat is also along the major population
centers of Australia. The Brown snake is fast moving, can
be aggressive under certain circumstances and has been
known to chase aggressors and repeatedly strike at them.
Even juveniles can kill a human. The venom contains
both neurotoxins and blood coagulants. Fortunately for
humans, less than half of bites contain venom and they
prefer not to bite if at all possible. They react only to
movement, so stand very still if you ever encounter one in
the wild. [ Image Source ]

1 Fierce Snake or Inland Taipan
While I did say that I would not include multiple sub-
species in this list, the incredible Inland Taipan deserves
a spot of its own. It has the most toxic venom of any land
snake in the world. The maximum yield recorded for one
bite is 110mg, enough to kill about 100 humans, or
250,000 mice! With an LD/50 of 0.03mg/kg, it is 10 times
as venomous as the Mojave Rattlesnake, and 50 times
more than the common Cobra. Fortunately, the Inland
Taipan is not particularly aggressive and is rarely
encountered by humans in the wild. No fatalities have
ever been recorded, though it could potentially kill an
adult human within 45 minutes.

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:oVery interesting read. Never knew there were some snakes more deadly dan the dreaded black mamba. Imagine snakes that can still kill you even if you were rushed to the hospital for a shot of antivenom....Scary shit!!!

I doubt this list

No SeaSnake

nickz: I doubt this list

No SeaSnake

we are talking of land snakes here.

nickz: I doubt this list

No SeaSnake

Human contact with Sea Snakes are very Very rare.... I guess that is why they're not on the list.

nickz: I doubt this list

No SeaSnake

@ Ajanii is right. See below
+ Belcher’s Sea Snake
The most venomous snake known in the world, a few
milligrams is strong enough to kill 1000 people! Less
than 1/4 of bites will contain venom, and they are
relatively docile. Fisherman are usually the victims of
these bites, as they encounter the species when they pull
nets from the ocean. Found throughout waters off South
East Asia and Northern Australia.