Do not make any loud noises or screams—the bear may think it's the sound of a prey animal. Slowly wave your arms above your head and tell the bear to back off.
Do not play dead. Direct punches and kicks at the bear's face, and use any weapon like rocks, branches, or bear spray to defend yourself. If a grizzly/brown bear charges and attacks you, PLAY DEAD. Do not fight back!
Furthermore, by running you'll trigger their chase/attack instinct and this is the last thing you want. Next, immediately break eye contact – staring a bear in the eyes is a sign of aggression.
A grizzly is more likely to act with aggression, while a black bear can be scared off. Check out this website for information on how to differentiate between a black bear and a grizzly.
Bears are normally shy, retiring animals that have very little desire to interact with humans. Unless they are forced to be around humans to be near a food source, they usually choose to avoid us.
The best bear repellent is to make noise while hiking or camping so bears are alerted to your presence and leave before an encouter occurs. If you do see a bear and it doesn't go away, then you can use an air horn or other noisemakers to scare it away.
A bear seeking food may be deterred by dogs and loud noises. A predatory bear could be attracted to dogs, noise, or just your smell.
What is the most dangerous bear in North America? Grizzly bears (Ursus arctos horribilis) are the most dangerous in North America, charged with multiple attacks on humans and casualties.
Grizzly and polar bears are the most dangerous, but Eurasian brown bears and American black bears have also been known to attack humans. Some species depredate livestock on occasion, and some bears, such as Asiatic and American black bears, may destroy fruit or other crops, especially corn.
However, grizzly bears are tougher than polar bears as they possess stronger and longer claws and an elongated skull with sharp and long canines that can completely separate the flesh from bone.
If you encounter a black bear, do not make eye contact. If you make eye contact, black bears will take this as an act of aggression. They will put two and two together and go nuts on you and ruin your life.
Avoid direct eye contact. Walk away slowly, if the bear is not approaching. If the bear charges, stand your ground (you cannot outrun it). Don't scream or yell.
Talk in a soft, monotone voice, and slowly wave your arms. This helps the bear know you're human and not prey. Avoid throwing anything at the grizzly; this will agitate them. Your best bet is to stand your ground and stay calm.
Although a silverback gorilla is very fast, quite strong, and has a longer arm span, it is unlikely that a silverback could defeat the much larger and faster grizzly bear in a fair fight. The one advantage that a Silverback might have is the enormous strength of its muscles.
In most situations, a grizzly bear will act defensively. Remember, the bear is acting aggressively to defend its personal space, cubs or food source, and if you are not perceived as a threat, the bear should leave the area.
According to Stephen Herrero in his Bear Attacks: Their Causes and Avoidance, 23 people were killed by black bears from 1900 to 1980. The number of black bear attacks on humans is higher than those of brown bears, though this is largely because black bears outnumber brown bears rather than being more aggressive.
The grizzly bear is the most dangerous bear. Research reveals that a grizzly bear attack is 3.5 times more dangerous than attacks from polar bears and 21 times more dangerous than black bear attacks.
While grizzly bears were thought to be the largest bear other than polar bears, Kodiak bears beat out grizzly bears in both size and weight.
However, Kodiak bears are larger than grizzly bears, and the ranges of these two subspecies do not overlap. Scientists note that Kodiak bears have been reproductively isolated from grizzlies and other bears for about 12,000 years.
Tigers, wolves, cougars, bobcats, coyotes, and humans eat bears, but these predators only focus on bear cubs rather than adult bears. The adult bears are too aggressive and dangerous to prey on – obviously a reason they are at the top of the food chain.
The grizzly bear has no natural enemies or predators in the wild. It is not really territorial, rarely fighting with other animals and tolerating fellow grizzlies, except during mating season.
Because of the difficulty in finding an abundance of food, grizzly bears tend to be smaller and more aggressive than brown bears. The term “grizzly” comes from their fur's color, with gray typically on their shoulders and hump.
Current leading causes of death for grizzly bears are conflicts with livestock operators and big game hunters, habituation of to human foods, malicious killing, and collision with vehicles.