Which Bear Is The Most Dangerous – Top 5 Dangerous Bears

Which Bear Is The Most DangerousApart from what you have seen in cartoons and Coca-Cola commercials, bears are very dangerous animals. Some of the bears are the most dangerous animals in the world.

In this article, we have made a comparison between bears to find out which bear is the Most Dangerous.

Not only that, but we will also see which bears are the most aggressive and If bears can actually attack and eat humans.

Which bear is the most dangerous?

Many species of bears are very aggressive and are known to attack humans. American black bears and Eurasian brown bears have a record of attacking humans the most . But, two species of bears that are the most dangerous are grizzly and polar bears. Polar bears are the deadliest, but grizzlies have a higher record of attacking humans.

Top 5 Most Dangerous Bears

  1. Polar bears

Polar Bears are very large size and covered with white fur, in some cases brown coloring.

Standing on all four legs, polar bears are 3.5 to 5 feet tall, but when they stretch out, they can reach more than 10 feet. They weigh on average 1000 pounds.

They are the largest land carnivore and are very dangerous.

They are not afraid of any animal, they will eat most of them in one bite.

Many species of bears are afraid of humans, but polar bears are not one of them. They will hunt humans until they catch them and eat them.

Polar bears usually live in polar regions within the Arctic Circle. With the change of global climate, many of them are pushed further south.

Also Read: Bear Hibernation Facts

  1. Grizzly bears

Grizzly bears are covered with brown fur, with golden and grey tips on their hair. Grizzlies are not as big as polar bears, their average total length is 6.5 feet.

On average, they weigh around 600 pounds.

They are the most aggressive when they have to defend their territory and their young.

Grizzlies have long claws and powerful jaws, and they are going to fight their prey until they make sure the prey is dead.

If they encounter humans, they’ll fight only if they feel threatened, and the result will often be the person’s death.

Grizzly bears live in the Western and Northern regions of the US, extending through Canada and across all of Alaska.

Also Read: Can Grizzly Bears Climb Trees

  1. Kamchatka brown bear

As the name suggests, Kamchatka brown bears are covered with brown fur.

These bears are known as the biggest bears in Eurasia with a body length, on average, of 8.7 feet and they weigh up to 1400 lbs.

Kamchatka brown bears are carnivores, they are very large and very deadly.

They usually don’t attack humans, but when they do, they will most likely kill the human.

Kamchatka brown bears are very protective of their cubs and very territorial, so it wouldn’t be a great idea to step into their territory.

They live in the Anadyrsky District of the former Soviet Union with subspecies found in Saint Lawrence Island in the Bering Sea.

  1. Kodiak bear

Kodiak bears rank as the second largest bears in the world. Kodiak bear is recognizable by their light-brown woolly hair.

A large one can reach over 10 feet when on his hind legs, and around 5 feet when on four legs.

The biggest Kodiak bears weigh up to 1500 lbs.

These bears avoid humans as much as possible, they prefer to be far away from people.

Some people are too curious, so they get closer to Kodiak bears, and even if these bears aren’t as aggressive as other bears in this list, they will attack a human when they get too close.

Each year on average one person gets injured from Kodiak bear.

They are inhabited in the islands of the Kodiak Archipelago in Southwest Alaska.

  1. Himalayan brown bear

These small Himalayan brown bears are covered in short, light-brown fur. Their size is from 5 to 7 feet, and they weigh on average 300 lbs.

Due to poaching and habitat loss, they are critically endangered.

Like the other bears on this list, Himalayan bears are very dangerous when their habitat is threatened.

When cornered, they can be deadly, not only to humans but for bigger and stronger predators as well.

They live in Northern Pakistan, Northern India, Nepal, West China, and Northern Afghanistan.

Are All Bears Dangerous?

In their own natural surroundings, most bears are alpha predators. Under normal conditions they don’t chase and feed on people.

A bear attack usually happens when the bear’s cubs are in danger or there was an invasion of the bear’s territory.

A mother bear can be very aggressive if her cubs are in danger or you accidentally come close to them.

She is the most dangerous bear when trying to protect her cubs, it will scare many predators even bigger than her.

Bears are also very dangerous while eating, they don’t like to be disturbed.

Some bears are more aggressive, others are far less aggressive.

Sloth bears, brown bears, Asiatic black bears are likely to attack people, while other bears are more likely to attack other animals.

Also read: When Are Bears Most Active

What Type Of Bear Is Most Aggressive Bear In The World & Why?

The biggest and primarily carnivorous bear known to hunt and eat humans is a polar bear.

These deadly predators consider humans an ideal prey because they rarely encounter us.

Polar bears are one of the most dangerous bears

If they lived in more densely areas, they would learn that attacking humans could lead to a quick death.

Omnivorous grizzly bears will only attack if they feel threatened. They often come in contact with humans and are relatively safe, if these humans know how to treat them.

They can become very deadly if they feel threatened or hungry.

According to statistics, grizzlies kill more people per year than polar bears, but it’s because grizzlies regularly come into contact with humans.

Every predatory creature knows to watch out for humans and avoid them, but not polar bears. If they are hungry they’ll eat humans in one bite.

So the most aggressive species of bear is the polar bear, but the most aggressive of all bears is the mother bear.

A mother bear is very protective, and doesn’t want humans or other animals around her cubs. She will fight 2 times bigger and stronger predators to save her cubs.

Which Bear Is Least Dangerous, Least Aggressive And Most Friendly?

Not a single species of bear is friendly. If any bear feels threatened or annoyed by a human, the bear will win attack and win the battle.

Some bears are less hostile than others, for example, a brown bear and an American black bear will run away from people, but if they feel threatened they will probably attack.

If all bears are counted, then Giant Panda is the most peaceful and the least dangerous bear out there.

Pandas will rarely harm humans, and almost never intentionally. In the wild, they don’t harm animals outside their own species.

The Spectacled bear is said to be the friendliest bear excluding pandas.

They live in South America, and they are the last species of bears there.

There has been only one human death recorded from the Spectacled bear.

They eat only 5-7% of meat, so they are generally non-aggressive to medium or large animals. Like all mother bears, female spectacle bear is not very welcoming, especially when she is protecting her cubs.

Are Bears More Dangerous In Spring Or Fall

Bears feel when summer is ending, it becomes colder, leaves change and fall from trees, so they become more active. They are preparing for winter and hibernation.

In the fall, bears will eat nonstop, sometimes up to 20 hours a day.

They have to put on weight, so they can hibernate all winter, until spring.

In the spring, they target many plants and seeds, so their diet is much lighter than in the fall.

Bears are always dangerous, especially a mother bear, so you can say they are more dangerous during the fall.

Do Bears Attack Humans And eat humans?

Let’s see which bears are known to attack and eat humans.

Do Grizzly Bears Attack and Eat Humans

Grown-up grizzlies don’t climb trees well and react to risk by standing their ground and scaring their attackers. Mothers defending their cubs will attack humans, they are responsible for 70% of humans killed by grizzlies.

Grizzly bears normally avoid contact with people.

They are very intelligent and they understand that messing with people is a death wish.

In some cases grizzlies attack humans, but very rarely.

If grizzly sees an old, injured, or weak human, one that cannot help itself, the bear would kill him then eat him.

But, these attacks are very rare, and bears almost never attack humans predatory.

Do Black Bears Attack and Eat Humans

American black bears attack humans very rarely, they’ll probably run away before you see them attack.

Female bears are motivated to attack humans when protecting their cubs, but it’s not predatory.

A recent study shows that lone, predatory black bears are responsible for many fatal black bear attacks in the US and Canada.

They are motivated to prey on humans, viewing them as a potential food source.

These bears usually don’t live close to people, and rarely encounter us. Black bears that live in more densely areas are afraid of people and will run away when they notice you.

Do Brown Bears Attack and Eat Humans

If they are surprised or feel threatened, brown bears will attack humans.

Usually however they don’t attack humans, and they avoid people as much as possible.

However, if an encounter occurs, a brown bear is 21 times more dangerous than the average black bear and 3.5 times more dangerous than the polar bear.

The most common scenario when a brown bear attacked a human was when people ran into a mother bear with cubs.

Brown bears are not known to prey on humans as a food source, but only attack in self-defense.

Do Polar Bears Attack and Eat Humans

Polar bears have the least encounter with humans than any other species of bears.

They are completely unaware of humans, and how dangerous for the bear can this encounter be.

Bears that live close to humans like grizzlies and black bears have this sense of fear toward humans, but polar bears don’t.

On rare occasions, when this encounter occurs, a polar bear will hunt a human for food.

They are primarily carnivores, which means they only feed on meat, so humans are to them just another piece of meat.

How Often Do Bears Attack Humans?

There are almost 3 fatal bear attacks on every continent every year. In recent years on the average the exact number has been 2.56 fatal bear attacks.

The greatest number occurred in 2005, when there were 6 attacks on each continent.

Bear attacks are a concern for those who are in bear habitats.

Most bear attacks on people happen when they are on leisure activities such as hiking, running, cycling, hunting, fishing.

Are Sun Bears Dangerous?

Sun bears are one of the smallest and one of the rarest bear species in the world.

They have half-moon shaped golden patch on their chest, that’s why they are called sun bears.

They are also called honey bears, because of their love for honey, and dog bears because of their size. Because they are so rare, they are the least known bears in the world.

Sun bears are surprisingly aggressive, they will attack without any reason.

They have extremely long claws and strong jaws and are described as one of the most dangerous animals in the jungle.

Sun bears are half the size of the American black bear, the average sun bear weighs 60 to 145 lbs, and is 48 to 60 inches long.

Are Panda Bears Dangerous?

Panda bears may seem lazy and sleepy, they are very competent swimmers and tree climbers.

They may look cute, but if they have to protect themselves, they will become very aggressive.

Usually, they avoid humans, and their black and white coat serves as camouflage.

Most of the people perceptions about pandas are wrong, they are infact striking animal with a powerful bite, and are very dangerous, just like other bears.

Are Koala Bears Dangerous?

If koala bears feel stressed or scared, they will chase a human a long-distance, then bite and scratch them with their long sharp front teeth and sharp claws.

They are not dangerous in general except when they feel threatened.

Koalas will usually run away from humans, and for a human to be hurt by a koala, something stupid has to be done, like trying to cuddle a wild koala.


Grizzly Bears Fighting, Grizzlies are extremely Dangerous Bears! 

Who Is More Dangerous

Are Polar Bears More Dangerous Than Grizzlies?

There is a joke about a guy that wanted to buy bear repellent in Alaska.

He looked at the seller and said “Is there any guarantee that it will work against black bears, grizzly bears, and polar bears?”.

The store guy said “You don’t have worry about black bears this far north, but yes it will repel black bears as well as grizzly bears”.

Then the buyer said “What about polar bears?”. The store guy said “Yes it does, but not in the way you think”. The buyer said “What does that mean?”.

The seller said “If you come upon a polar bear, spray it in your face and it really will not matter what happens next. Because he will eat you.”

Grizzlies have many resources so they don’t have to engage in predatory attacks on humans. Attacks only happen when they are protecting their cubs, or you took their food.

Polar bears have much less contact with humans than grizzlies. They are carnivores and have a hard life, they don’t have many resources like grizzlies.

Their lack of fear and extreme hunger will make them hunt humans for food. Overall, polar bears are more dangerous than grizzlies.

Are Black Bears More Dangerous Than Brown Bears?

Black bear attacks tend to occur when they are encountered suddenly, they feel threatened and will attack.

Brown bears live in more open spaces and are less likely to be surprised by humans.

Because of this, black bears are considered more dangerous than brown bears.

Are Black Bears More Dangerous Than Grizzlies?

Grizzly bears are bigger than black bears, and in nature, the bigger one is usually the stronger one.

Grizzly bears have a stronger bite and bigger claws.

While black bear weighs around 300 pounds, the average grizzly weight is around 600 pounds.

Black bears are very easily spooked, while grizzly won’t run away if you clap your hands.

Black bears are great tree climbers, while grizzlies aren’t, so grizzly will defend himself on the ground while a black bear will run away.

Related Questions

Are bears more dangerous than wolves?

Wolves are less likely to encounter humans than bears.

There have been recorded three cases of wolves assaulting humans in North America, while there are many more cases of bear attacks on humans.

Are bears more dangerous than lions?

Bears can move surprisingly fast, much faster than a human.

They are also unbelievably strong and have an excellent sense of smell. They are strong climbers, and some of them even stronger swimmers (polar bears).

On the other hand, lions are very fast, but they tire after running short distances.

They are strong when in a group, and try not to be alone too much.

They hunt 2-3 hours a day, they spend other hours resting, sleeping, or sitting.

It is a close battle, but if we are talking about a polar bear, then bears are definitely more dangerous.

Are bears more dangerous than tigers?

Tiger is the biggest animal in the cat family, measuring up to 13 feet in length and weighing on average 660 pounds.

Tigers will kill a prey more than 5 times heavier than their own size.

They are incredibly strong, fast and smart, they are one of the deadliest animals on the planet, definitely more dangerous than bears.