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.
The researchers found it more common for members of the same species to fight over food, but also recorded previously-undocumented competitions between polar bears and brown bears, during which the grizzlies, like typical older siblings, asserted social dominance.
Among all bear species, both the grizzly bear and polar bear take the crown as the strongest. Weighing more than around 800 pounds — the maximum recorded size is twice that figure — an individual male grizzly is equivalent to around five humans in strength … and even more when enraged.
1. Dung Beetle. A dung beetle is not only the world's strongest insect but also the strongest animal on the planet compared to body weight. They can pull 1,141 times their own body weight.
Predators. Adult polar bears have no natural predators except other polar bears. Cubs less than one year old sometimes are prey to wolves and other carnivores. Newborn cubs may be cannibalized by malnourished mothers or adult male polar bears.
A hippo would win a fight against a polar bear.
Instead, the hippo needs one or two bites to incapacitate the polar bear. Its massive teeth would penetrate the bear's fur and skin, breaking bones and ripping into organs. In this rare case, speed on land would only matter at the beginning of the fight.
The gorilla and grizzly have a relatively similar bite strength, but the bear's build makes it harder for a gorilla's bite to be equally as effective. The gorilla's biggest advantage is its spry movement, whereas the grizzly's primary advantage is its claws. The grizzly is larger, but the gorilla is stronger.
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 in the enormous strength of its muscles.
A bear would win a fight against a lion. Bears have the advantage in just about every aspect, from size to offensive capabilities. The only time that a lion would win is if it managed to sneak up and ambush a bear, leaping onto it and biting into its head with such power that it shattered the skill.
The grizzlies are more powerful, but the wolves are quicker and out-number the bear, says Smith. “It's almost like the wolves are the mosquitoes buzzing around the bear's head,” Smith says. “Although individual mosquitoes can't overpower you, if there are enough of them, they'll win.
A fully grown saltwater crocodile would win a fight against the largest bears. Size matters in these fights and crocodiles have that advantage. Bears are undoubtedly strong, but they've never faced anything like a crocodile to know their weaknesses.
If a tiger could get its teeth around a bear's jugular or on its spinal cord, it could quickly make short work of a smaller polar bear. However, the polar bear would likely win the battle in a head-to-head fight featuring two fully grown males.
Adult polar bears have no natural predators, though walruses and wolves can kill them.
“Both walruses and polar bears are powerful in the water. Both could handle most potential predators, but not killer whales,” Kovacs said.
Polar Bears have no natural predators and are rarely afraid of anything or anyone.
A bear would beat a Komodo dragon in a fight, but it might get bloody. The problem that Komodo dragons face is that they are very short compared to a bear. For example, if a Komodo dragon approached a grizzly bear, the bear would stand on its legs to appear bigger and scare it away.
The average weight of a polar bear is 450kg, while a lion weighs around 190kg. This gives polar bears a big physical advantage and would help them win a fight with a lion.
An elephant would win in a polar bear vs elephant fight. The elephant is simply too large for the bear to do anything meaningful against. The polar bear can't exactly leap onto an elephant's back, so it would only be able to attack the elephant's legs and stomach area.
A shark would win a fight against a bear. Although a polar bear might be the best match out of any bear for a shark, it would still lose. It doesn't have the toolkit needed to slay a creature so much larger, faster, and deadlier than it.
Unfortunately, neither playing dead nor fighting back works as well against polar bears as against their smaller relatives.
But despite their size and strength, there are animals that do prey on them. Man appears to be their biggest predator. Big cats like leopards and panthers sometimes kill and eat these big reptiles. Large snakes can also do a lot of damage to alligators and crocodiles.
Generally speaking, the bear would win if a fight took place on land, while the shark would probably win if the fight took place in deep water. A fight in shallow water could go either way, although the bear would try to escape onto land, if possible.
In the battle of the grizzly bear vs tiger, a Siberian tiger would win a fight against a grizzly bear. The Siberian tiger is an ambush predator, and it's the only big cat that comes close to the grizzly bear in terms of size and power.