11 Snakes With the Biggest Heads in the World

Snakes With The Biggest Heads
Photo by Dan LeFebvre

There are more than 3,900 snake species in the world, and almost all of them have unique characteristics that make them stand out from one another, but some snakes are special because of their large size.

The biggest head (and body) belongs to the anaconda snake, which lives in the Amazonian regions of South America and grows up to 30 feet long!

Here are 11 types of snakes with the biggest heads in the world.

Table of Contents

1. Rhinoceros Viper

The rhinoceros viper is a venomous snakes with the world’s biggest heads. It is found in Africa and can grow up to six feet long; its head is large and flat, and it has a short, thick body. 

The rhinoceros viper’s venom is very potent and considered one of the most dangerous snakes in the world. If a rhinoceros viper bites you, you will need immediate medical attention. You may have swelling, tingling, pain at the bite site, nausea, and vomiting. 

You might also experience weakness or difficulty breathing. Antivenom is available for treating the effects of a rhinoceros viper bite, but only if you receive treatment within four hours. Most people recover fully from this type of snakebite without any permanent damage.

2. Bighead Sea Snake

The bighead sea snake is a type of snakes with the biggest heads. These snakes are found in the Indian and Pacific Oceans and can grow up to six feet long. The bighead sea snake’s diet consists mostly of fish, which they eat whole. 

Due to their large head size, these snakes have difficulty swallowing anything else. They also have problems seeing, so they rely on sensing vibrations to hunt for prey. 

The snake lives mainly in shallow waters and rarely ventures into deep water. These types of snakes do not possess fangs or venom like other snakes; instead, they kill prey by constricting them until they suffocate.

3. Dog-Toothed Cat Snake

The Dog-Toothed Cat Snake is a species of venomous snake found in the rainforests of South and Southeast Asia.

It is a member of the cobra family and can grow up to 6.6 feet in length. The snake gets its name from its large, canine-like teeth, which are used to puncture prey and deliver venom. 

The Dog-Toothed Cat Snake is an opportunistic feeder and will eat anything it can catch, including rodents, lizards, birds, and other snakes. When threatened, this snake will rear up and spread its hood, showing off its bright red or orange underside. 

If that doesn’t scare away the threat, it will strike repeatedly. These snakes with the biggest heads are nonvenomous and harmless to humans as long as they don’t get bitten.

4. Arabian Horned Viper

The Arabian horned viper is a venomous snake found in the deserts of North Africa and the Middle East. It is a small snake, with adults only reaching lengths of up to two feet. However, what it lacks in size, it makes up for in head size. 

The Arabian horned viper has one of the snakes with the biggest heads relative to the body size of any snake in the world.

That big head houses potent neurotoxic venom that can kill an animal as large as a dog within minutes. That’s why this is one of the most feared snakes with the biggest heads in the world! 

We have the king cobra at number four on our list. It is one of the longest venomous snake species on Earth, growing to more than eighteen feet long.

5. Cottonmouth Snake

The cottonmouth snake is a venomous snake found in the southeastern United States. It is a member of the viper family and can grow to be up to six feet long. The cottonmouth gets its name from the white lining of its mouth, which shows when it feels threatened. 

This snake is not shy about biting and will do so if it feels threatened or you try to handle it. When threatened, this snake may also hiss loudly and spread out its neck ribs, so they look like fangs. If this snake bites you, it’s best to get medical attention as soon as possible! 

Their bites contain hemotoxic venom that causes your blood vessels to break open and leak fluid into the surrounding tissue.

Signs of envenomation include pain, swelling, bruising at the bite site, headache, nausea/vomiting, hemorrhage (excessive bleeding), and low blood pressure/shock.

6. Wagler’s Palm Pit Viper

Found in the jungles of southern India, this species of pit viper gets its name from the German herpetologist Georg Wagler.

It’s one of the largest snakes with the biggest heads in the world, with some specimens reaching up to 13 feet in length. But what sets this snake apart is its massive head, which can be up to one-third the size of its body! 

As a result, it has a wide jaw that opens wide, and all those teeth stick out—just looking at it will make you shiver. What are you waiting for?

Get out there and find your own Wagler’s Palm Pit Viper. You won’t regret it! It’s extremely long, and I don’t recommend trying to touch or handle it. 

If you ever encounter one, please stay away as they’re dangerous animals. You may also have heard of its cousin, the Malayan Krait; they are both found in Asia and have similar characteristics, so please be careful not to confuse them!

7. Eastern Hognose Snake

The Eastern hognose snake is a non-venomous snake found in the southeastern United States. They get their name from their large, upturned noses, which they use to dig for food.

These snakes with the biggest heads can grow up to four feet long, with an average of around two and a half feet. 

The record for the largest Eastern hognose snake was just over five feet long! Eastern hognose snakes have dark brown or black upper bodies with lighter-colored bellies. 

Eastern hognose snakes will not attack unless provoked. These curious creatures often coil into an S shape and play dead while emitting a foul-smelling odor when threatened. 

To tell if you’ve encountered an Eastern hognose snake, you should look at the underside of its head: if it has enlarged scales that form a beard, then you’ve likely come across one of these serpents.

8. Copperhead Snake

The copperhead snake is a type of venomous snake that is found in the United States. These snakes with the biggest heads are known for their large heads and ability to deliver a painful and potentially deadly bite.

Copperhead snakes are not typically aggressive, but they will defend themselves if they feel threatened. 

If you see a copperhead snake, it is best to leave it alone and give it plenty of space. It would be best to avoid any areas where these snakes may be hiding, such as logs or rock piles. 

You can also look for other signs of copperhead presence, such as scat (feces) or droppings on leaves near water sources.

For safety reasons, you should always wear thick boots while walking through the underbrush, and don’t stick your hands anywhere where there might be hiding places like abandoned wells or rock piles.

9. Blunt-Headed Tree Snake

The blunt-headed tree snake is found in the tropical forests of Central and South America. It is a slender snake with a brown or green body and a light-colored head. This snake can grow up to 2.5 meters (8 feet) in length, but its average length is 1.5 meters (5 feet). 

The blunt-headed tree snake is not venomous but a constrictor, killing its prey by wrapping its body around it and squeezing it until it stops breathing. If the blunt-headed tree snake feels threatened, it will coil into a circle to protect itself. 

These snakes are mostly nocturnal animals, meaning they are active at night. They hunt during the day when they lie in wait on branches overhanging their prey’s path or near small water holes where amphibians are plentiful.

10. King Cobra

The king cobra is the longest venomous snakes with the biggest heads in the world, with some specimens reaching 18 feet in length. But it’s impressive not just in its length – the king cobra also has a very large head, up to one-third of its total length! 

The king cobra’s large head is lined with dozens of sharp teeth, which it uses to inject its powerful venom into prey.

This venom can kill an elephant and even humans if they’re not treated quickly. While the king cobra is a fearsome predator, it’s also an important part of the ecosystem in many parts of Asia. 

For example, it helps keep rodent populations down. As for humans? When bit by a king cobra, you should seek medical attention immediately – as this snake is responsible for more human deaths than any other species on Earth.

11. Gaboon Viper

The Gaboon viper are snakes with the biggest heads found in Africa’s tropical forests. It is the largest member of the viper family and can grow up to 8 feet long.

The Gaboon Viper has the biggest head of any snake in the world, and its fangs can be up to 2.5 inches long. 

You will remember that if you are lucky enough to see one of these snakes in the wild, they have no problem striking if they feel threatened or cornered.

They feed mainly on other snakes, rodents, lizards, and small mammals like monkeys. Although people find many things creepy about them (like their huge heads), they make good pets if they are well cared for!


Looking at the 15 snakes with the biggest heads in the world consist of venomous and non-venomous snakes. Most of these snakes with the biggest heads are deadly and are threats to humans and animals.

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