The gorilla's behavior and fighting techniques may give it a slight edge, but the polar bear's sheer power and speed would likely give it the win. So, it's likely that the polar bear would be the winner in a fight between a polar bear and a silverback gorilla.
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 only predator to prey on gorillas is the leopard. Walter Baumgärtel found the remains of several gorillas after they had been killed by leopards in the Virunga Volcanoes.
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.
They are both highly aggressive creatures, so a prolonged fight could be brutal. Even then, the lion would probably come out on top, making up for its relative lack of stamina with sheer power. A lion has a good chance of killing a gorilla in a one-on-one fight. The only thing is that a lion rarely fights alone.
Predators. Leopards and crocodiles are large carnivores which may prey upon gorillas. Humans are the greatest threat to all gorilla populations.
If a fight occurred between a hippo and a gorilla it is obvious that a hippo severely outmatches even the largest of gorillas and strongest gorillas. In a fight, a hippo can easily kill a gorilla by either charging through them or using its large mouth to take them out.
It is believed that a gorilla punch is strong enough to shatter your skull with one slam of its arm:/Between 1300 to 2700 pounds of force. Gorillas on (avg. 400 lbs) have a muscle mass density almost 4 times higher than the most heavily muscled powerful human you know.
Exerts Most Absolute Force: Whales
A blue whale can generate a maximum force of approximately 60 kilonewtons. Whales can claim the title of the strongest creature on the planet simply due to their enormous size.
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.
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.
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.
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.
An elephant would win in a fight against a gorilla. Gorillas are certainly powerful and smart animals, but they lack any definitive means of killing an elephant. Unless they happened upon an elephant lying down and managed to inflict severe bites to them, a gorilla simply would not stand a chance.
Regarding size, strength, and agility, the gorilla is undoubtedly the larger of the two creatures. However, the rhino's horn can be a devastating weapon against any animal – including a gorilla. Therefore, there is no clear-cut champion when it comes down to physicality alone.
For many humans to beat a mountain gorilla, that would need your strength combined into one person which is even impossible. Muscles aren't thick enough to prevent human from choking them out.
Certain reptiles such as chameleons and caterpillars are what are gorillas scared/afraid of. They are also afraid of water and will cross streams only if they can do so without getting wet, such as by crossing over fallen logs, and dislike rain.
Gorilla habituation is a long and complex process, but it can result in gorillas that are friendly and used to human beings. Many countries with large gorilla populations, such as Uganda, Rwanda, and the Democratic Republic of Congo, offer habituated gorilla tracking experiences for visitors.
What animal can kill a gorilla? The gorilla's only natural predator is the leopard, and even they very rarely actively hunt juvenile gorillas. Crocodiles and anacondas share a habitat with them and can be deadly to gorillas, but these attacks only occur on rare occasions.
On land, the bear could possibly win a fight if it managed to flip over a crocodile and attack its underside. However, this fight would not be over quickly: the bear would need to do a lot of damage to finally kill the reptile.
In the frozen tundra of the arctic circle, polar bears would likely win the fight. The scale tips in favor of the tiger in every other environment.
An elephant would beat a bear in a fight. Even though we have granted this hypothetical bear the best features of all the various species, the fact remains that they cannot do enough damage to kill an adult elephant. A fully grown bull elephant would most likely smell or hear a bear coming long before it showed up.