1. Garter snake
   Python
2. Cobra
   Rattlesnake

These snakes are so common in America they're often incorrectly called gardener snakes and they're one of the few snakes to live all over New England. They've even been recognized as the state reptile of Massachusetts since 2006.

1. Coastal taipan
   Boa constrictor
2. Fer-de-lance
   King cobra

A king cobra can stretch 18 feet long, and a cobra of that length can stand six feet in the air before it attacks. They don't spit, like some cobras, but they smell with their tongue, and they hiss and growl to warn encroachers.

1. Coral snake
   Thai cobra
2. Black mamba
   Green mamba

Black mambas get their name from their black mouths, and they're some of the deadliest and speediest snakes on the planet. An untreated black mamba strike will cause fatality within hours, and these creatures can slither faster than 12 mph.

1. Eastern coral snake
   Cottonmouth
2. Inland taipan
   Copperhead

It is said that a single bite from this notorious snake can cause fatality in 100 adult humans. Luckily, it isn't an aggressive animal, and like most snakes, it will run for cover when confronted by humans. Nevertheless, an untreated bite is fatal rather quickly.

1. Golden tree snake
   Many-banded krait
2. Harlequin snake
   Lancehead

There are several types of krait slithering around the planet, and the many-banded krait is the most venomous of them all. It envenoms at a highly successful rate, and antivenom fails to prevent fatality in about half of victims.

1. Olive python
   Mamushi
2. Buttermilk racer
   Yellow-bellied sea snake

The yellow-bellied sea snake is one of the most poisonous and widespread on Earth, but very few human fatalities have been reported. Despite its potent venom, it doesn't have a great injection technique, like most sea snakes, so bite victims are usually spared the toxins.

1. Russell's viper
   Indian cobra
2. Tiger snake
   Eastern diamondback

The four deadliest snakes in India have been given the designation of the "Big Four," and Russell's viper is the deadliest of them all. It's wildly aggressive and recklessly fast, claiming 25,000 lives a year.

1. Indian cobra
   Boomslang
2. Saw-scaled viper
   Common krait

Boomslangs can open their jaws almost perfectly flat when striking, allowing them to latch on to victims with venomous fangs in the back of their jaw. Its venom causes internal bleeding and is fatal without treatment, but this snake only strikes when provoked.

1. Gaboon viper
   Saw-scaled viper
2. Eastern coral snake
   Western diamondback

You can find these snakes all over the southeast U.S. as well as some parts of Arizona and Texas, and although they're highly venomous, their injection techniques aren't that great. They can't inject all their venom in a single bite, and they can't control how much they inject.

1. Western diamondback rattlesnake
   Tiger snake
2. Boa constrictor
   Garter snake

The western diamondback isn't the most venomous rattlesnake and isn't even as dangerous as the eastern diamondback, but it's responsible for a lot of bites because of its aggressiveness. They don't slither away from humans, they confront them.

1. Garter snake
   Tiger snake
2. Eastern diamondback rattlesnake
   Coastal taipan

When many people think of snakes in America, they think the southwest desert, but the swamps of the southeast are home to the country's deadliest, including the eastern diamondback rattlesnake, which is the largest venomous snake in the country.

1. Black mamba
   Death adder
2. Boomslang
   Cottonmouth

The death adder is one of the deadliest snakes in the world, and no snake in Australia has longer fangs. It has an efficient delivery system and untreated bites prove fatal to humans within hours. It also has a lightning-fast strike.

1. Tiger snake
   Copperhead
2. Cape cobra
   Saw-scaled viper

Copperheads have great camouflage, so when being approached, their No. 1 defense tactic is to remain still. They can be almost invisible and are easily stepped on, which is why there are so many copperhead bites in the U.S. each year. They have rather weak venom, however.

1. Mulga
   Common krait
2. Caspian cobra
   Anaconda

The mulga snake shares a name with the shrub and parrot that also dot Australia's outback, but it's also known as the king brown snake. Its bites are very treatable, but victims need to be treated with black snake antivenom. This king brown snake is not a true brown snake.

1. Coastal taipan
   Black-banded sea krait
2. Gaboon viper
   Yellow-bellied sea snake

Sea kraits, sea snakes, eels and any arm- and leg-less slithering sea creature gets lumped into the same category, but sea kraits and sea snakes are actually different. Sea snakes are fully aquatic while kraits are only semiaquatic.

1. Eastern diamondback
   Copperhead
2. Timber rattlesnake
   Cottonmouth

The cottonmouth is one of the big four snakes in the United States, and you can find them all over the southeast. They love swamps and marshes and are also known as swamp moccasins. Their venom kills tissue cells but is seldom fatal.

1. Mojave green snake
   Eastern coral snake
2. Massasauga
   Corn snake

The massasauga is also known as a prairie rattlesnake, and it covers middle America from Canada to Mexico. They are always tan with a combination of blotches and spots. These snakes avoid humans at all costs, but since attacks are so rare, so is the antivenom. Untreated bites can be fatal.

1. Timber rattlesnake
   Eyelash viper
2. Hairy bush viper
   Saw-scaled viper

These small snakes can feature a wide range of colors and patterns from neon yellow and pink to tan and green with brown speckles or blotches. The most consistent feature are the "eyelashes," which are oddly-shaped scales. Snakes don't have eyelids or eyelashes.

1. Inland taipan
   Green mamba
2. Eastern coral snake
   Boomslang

The green mamba lives in the jungles of central Africa and although it's glowing green, it's rarely seen. It might be because it blends in with the jungle greenery so well, and if you do see one, you want to stay well clear of it.

1. Tiger snake
   Blue krait
2. Eastern coral snake
   Caspian cobra

Tiger snakes are some of the most venomous slithering around Australia, and they feature a wide range of colors and patterns but are frequently seen with a banded pattern similar to tiger stripes. Only the brown snake is deadlier in the area.

1. Bushmaster
   Cottonmouth
2. Timber rattlesnake
   Eastern racer

Bushmasters are one of the largest vipers on Earth and they are found in Central and South America, where they are the longest venomous snake in the area. There are three types of bushmaster snake and they are all venomous, although they rarely attack humans.

1. Copperhead
   Rhabdophis
2. Corn snake
   Eastern coral snake

Although many people use venomous and poisonous interchangeably, they mean different things. A venomous animal can inject you with toxin. A poisonous animal can't inject you, but you will be affected if you touch the animal. A toad is poisonous. A snake is venomous. This snake is both.

1. Garter snake
   Ornate flying snake
2. Ribbon snake
   Pit viper

These snakes don't have wings and can't really fly, but the way they fling themselves through the air and glide from tree branch to tree branch is remarkable. They contain small amounts of venom not harmful to humans.

1. Cottonmouth
   Hairy bush viper
2. Copperhead
   Desert horn viper

This viper is found in Central Africa and it has many names all surrounding its unique look, but its official name is atheris hispida. They're pretty elusive snakes that do their best to stay away from humans, and not much is known about their bite except it's fatal.

1. Yellow-bellied sea snake
   Beaked sea snake
2. Dubois' sea snake
   Black-banded sea krait

It's believed that nine out of every 10 deaths that occur from a sea snake bite come at the hands of the beaked (aka hooked-nose) sea snake. It is also believed the beaked sea snake accounts for more than half of all sea snake bites.

1. Corn snake
   Python
2. Horned desert viper
   Timber rattlesnake

This north African snake appears in a wide range of colors and patterns, but it's most known for the two "horns" above its eyes. They sidewind when they slither, and 40 mg of their venom can be be deadly to humans.

1. Golden lancehead
   Eastern racer
2. Ribbon snake
   Corn snake

Golden lanceheads are native to Brazil and they don't live anywhere close to humans, so bites rarely occur, if ever. Being a lancehead, its venom is deadly and it's considered one of the most dangerous snakes in the country.

1. Western brown snake
   Western diamondback rattlesnake
2. Common kingsnake
   Mojave green snake

Australians are very familiar with brown snakes, and although the western brown may not be as deadly as the eastern brown snake, it is still highly fatal. Like most snakes, these snakes will leave you alone unless you corner them.

1. Redbelly snake
   Ribbon snake
2. Pine snake
   Fer-de-lance

The fer-de-lance has a multitude of names and it's found slithering around Mexico, Central America and northern South America. It is considered the most dangerous snake in all those areas. The goliath spider, which is the world's largest spider, sometimes attacks the snake.

1. Timber rattlesnake
   Mojave green
2. Massasauga
   Copperhead

No rattlesnake on the continent lives as far north as the timber rattler, which can be found all the way in southern New Hampshire. At one point it lived up through Maine and into Canada. It's a highly venomous snake but isn't highly aggressive, so human attacks are rare.

1. Tiger snake
   Mamushi
2. Copperhead
   Massasauga

The mamushi is an Asian pit viper similar to the cottonmouth found in the United States. Mamushi also live near swamps and marshes, giving them the name Japanese moccasin. They strike up to as many as 3,000 people a year, but less than a dozen of those bites are fatal.

1. Timber rattlesnake
   Red-bellied black snake
2. Copperhead
   Cottonmouth

This oil-black snake can be found slithering around Australia's east coast. It has a glossy coat of sleek black scales with a fiery red underbelly, and despite its intimidating look, it's known as one of Australia's least dangerous.

1. Indian cobra
   Forest cobra
2. Caspian cobra
   Indochinese spitting cobra

Cobras are known for dancing and spitting, and this is one of the most prolific spitters on the planet. Its bite is deadly to humans and its spit can cause blindness if hit in the eye. They are found in Southeast Asia and can grow as long as five feet.

1. Black rat snake
   Corn snake
2. Jararaca
   Northern water snake

This slim and venomous snake is found all over South America and has many names around the continent. It's one of the most common snakes in the area and it does whatever it can to avoid confrontation. They are under threat from a multitude of animals in the area.

1. Coastal taipan
   Green mamba
2. Saw-scaled viper
   Indian cobra

The saw-scaled viper is one of the "Big Four" deadly snakes and is responsible for thousands of fatalities each year. This viper injects venom on 80% of its bites and is said to have one of the most painful bites on Earth.

1. Tiger snake
   Coastal taipan
2. Cape cobra
   Leaf viper

Each scale on the leaf viper looks like a single leaf, giving the snake its name. It's also known as a tree or bush viper. It features a host of colors and is found in central African rain forests, typically steering clear of humans.

1. Eastern coral snake
   Corn snake
2. Ribbon snake
   Malayan krait

Krait snakes are one of the "Big Four" deadliest snakes and the Malayan, or blue, krait is one of the deadliest. About 70% of untreated attacks end in fatality. They aren't aggressive and will run and hide as a first resort all the time.

1. Vipera ursinii
   Balkan whip snake
2. Coronella girondica
   Smooth snake

These snakes are also known as meadow vipers in Italy and can be found over Europe. Its habitat ranges all the way to China, and although it's venomous, it's not a particularly dangerous snake, as few strikes are reported.

1. Hook-nosed snake
   Desert horn viper
2. Hairy bush viper
   Leaf-nosed snake

This snake is a master of disguise and is patterned to camouflage specifically among the trees of the Madagascar forests. They get their name from their leaf-shaped noses, and their venom isn't strong enough to prove fatal in humans.

1. Eastern brown snake
   Caspian cobra
2. Gaboon viper
   Boomslang

Only the inland taipan is considered more venomous than the eastern brown snake, which can be found all over eastern Australia. They can be solid brown or have a banded pattern. The eastern brown snake is notorious for being aggressive and ill-tempered.