How Dangerous Are Black Bears?

By Lynn Rogers, PhD

In working closely with wild bears for over 50 years, I have gradually become more and more comfortable with them as I learned their “language” and how they think. I have learned to trust certain bears and bear families to the extent that they mostly ignore me as I walk and sleep with them for up to 24 hours at a time.

I used to think black bears were very dangerous, but my thinking evolved in much the same way people have changed their attitudes about gorillas. I now interpret aggressive displays by black bears in terms of their fear rather than mine.

Their most common aggressive displays are merely rituals they perform when they are nervous.

Nervous bear bluster

When I see any bluster, I feel safe. It means the bear wants to talk about the problem it has with me. I have never had one come after me and hurt me. The only times I have been bitten is when I initiated the contact.

Black bears have killed 61 people across North America since 1900. This no longer worries me. My chances of being killed by a domestic dog, bees, or lightning are vastly greater. My chances of being murdered are 60,000 times greater. One of the safest places a person can be is in the woods.


Welts from a black bear slap

In working closely with wild bears, I have used bad bear manners on occasion and been slapped, but the slaps were not that damaging – usually just welts. This was a hard slap by a mature female whose claws were fully spread to nine and a quarter inches wide.

The damage from a slap is nothing close to the folklore that a bear can disembowel man or beast with a swipe of the paw. Black bear claws are strong for climbing trees, but not sharp for holding prey. Grizzly bear claws are even duller because they are used for digging.

Black bear claws

A big revelation to me was how reluctant black bear mothers are to defend their cubs against people, even when the family is cornered in a den and I’m trying to stick the mother with a needle to tranquilize her. Defense of cubs is more a grizzly bear trait. There is no record of anyone being killed by a mother black bear defending her cubs, and attacks are very rare. We routinely capture black bear cubs in the presence of mothers and have never been attacked.

Sabre-toothed cat

Black bears are so timid today partly because they evolved alongside such powerful predators as saber-toothed cats, American lions, dire wolves and short-faced bears, all of which became extinct only about 12,000 years ago. Black bears were the only one of these that could climb trees, so black bears survived by staying near trees and developing the attitude: run first and ask questions later. The timid ones passed on their genes to create the black bear of today.

Mother and cub climbing a tree

That timid attitude still serves black bears well now that people have spread across North America. Startled black bears run away, often to a tree. By contrast, a startled grizzlies may charge and occasionally attack, making grizzlies over 20 times more dangerous than black bears.

What should people do if they see a black bear in the wild? Basically, enjoy it. We like to make ourselves inconspicuous to watch them longer before they discover us and run. To make the bear run away, step out and wave and say “Hi, I’m a human!” We have seen a lot of advice to avoid eye contact and avoid running away, but we have been unable to find any instance where doing these things has precipitated an attack. Fearful people usually tell us “I ran one way and the bear ran the other.” We don’t recommend climbing trees.

Bear in aspen forest

Offensive attacks are very rare and include all of the killings by black bears. These are generally unprovoked predatory attacks in remote areas where bears have the least contact with people. Bears that visit campgrounds, bird feeders, and garbage cans almost never kill people, even though these bears have by far the most contact with people. The 750,000 black bears of North America kill less than one person per year on the average, while men ages 18-24 are 167 times more likely to kill someone than a black bear.

Most attacks by black bears are defensive reactions to a person who is too close, which is an easy situation to avoid. Injuries from these defensive reactions are usually minor.

Pepper-spraying a bear

Carrying a small can of pepper spray is a good way to feel self-confident around black bears. It works as well on bears as it does on dogs. They don’t go away mad, they just go away. This 4-year-old girl made this bear run away by spraying it in the eyes. The next day, the girl saw the same bear and it ran up a tree.


Wary approach

Bears can look like they are stalking when they are actually approaching out of simple curiosity. Will a bear attack because it senses you are afraid? No. Most people who find themselves near a black bear are afraid, and they are not attacked. Black bears are not territorial toward people like some dogs are. Black bears are mostly afraid they will be attacked. If a person doesn’t want a black bear to come closer, act aggressively.

Campground food temptation

Black bears that come into campgrounds are looking for food, not people, and can easily be chased away in most cases. In our experience, no matter how bold and confident bears seemed, they still recognized aggressive behavior and ran away when someone yelled and ran toward them.

People interacting with a bear

Besides pepper spray, throwing stones is also effective, especially if you yell and act aggressive at the same time.

As people learn more about black bears, fewer and fewer people feel they must shoot them on sight, and people enjoy seeing them. We don’t recommend touching wild bears because they may react defensively with a nip or a slap.

However, the many people who interact closely with wild black bears across North America incur few injuries, showing that black bears are not as dangerous as most people have thought.

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