Encounters between grizzlies and polar bears have been reported in past literature; in these encounters, grizzly bears killed denning female polar bears while at a significant size disadvantage.
In a hypothetical battle, both bears would exhibit immense strength and aggression. However, grizzlies might have the upper hand due to their stronger, longer claws and elongated skulls equipped with sharp canines that can easily tear flesh from bone.
Arctic grizzlies are small, but they don't hesitate to chase away polar bears twice their size, according to a report in the Journal of Mammalogy.
According to short search I made, polar bear has stronger bite, while kodiak has stronger forelimbs. Given to the rules, I would go with it can go either way, slightly in favor to kodiak, given the fact, polar bear mostly hunts in water and kodiak has more fat in average.
In Alberta, most known grizzly bear mortality is caused by humans. Such causes include: Poaching, Being mistaken for a black bear during the black bear hunting season, Self-defence, Accidents, such as road kill.
Bear Attacks. Although the bear safety rhyme “If it's brown, lay down. If it's black, fight back. If it's white, goodnight” sounds like good advice, you have to know why a bear is attacking you before you can decide the best way to respond.
Despite the cute name, sloth bears are known for being particularly aggressive, especially toward humans. Found in India and Sri Lanka, these bears have long, sharp claws and a powerful bite. Unlike most other bears, sloth bears are known to attack humans unprovoked, often causing serious injuries.
Crocodiles are too large and strong for bears to overcome. 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.
The only known predators of these bears are humans and other polar bears, and human-made threats have led to their populations being threatened. Commercial and sport hunting of polar bears grew in the 1900's, depleting their populations.
Polar bears can live 20 to 30 years, but only a small percentage of polar bears live past 15 to 18 years.
They do mate and breed with grizzly bears, but black bears are too genetically far apart from them.
Black Bears: If you are attacked by a black bear, DO NOT PLAY DEAD.
Move to safe shelter (e.g. vehicle or building) if available, and wait until it is safe to proceed. Group up. If no safe shelter is available, group up with others and stand positioned to allow for safe deployment of deterrents (e.g. firearm, pistol launcher, bear pepper spray) – until the bear leaves.
The Marsican brown bear, otherwise known as the Apennine brown bear, has a relatively calm temperament, with no aggression shown towards humans.
Grizzly bears account for the most human deaths. They kill twice as many people as the North American black bear, which is the most abundant species on the continent. Half of the attacks from grizzlies were mothers protecting their cubs.
For speed the Gorilla's top speed runs about 23 mph (about how fast I sprint at short distances), Grizzly 35 mph (faster than Usain Bolt).
Their natural predator is the leopard, although in truth, their biggest threat might be humans. Gorillas suffer from habitat loss due to invasions of their protected jungle ecosystem.
With the men prevented from rushing the gorilla all at once, as in Magill's calculations, they face long odds, Hobaiter believes: “Honestly, 100 guys wouldn't stand a chance,” she says. “They're going to be swatting at him like out-of-breath children, and a single one of his punches would floor them.
Answer: Lying down is a last resort and should only occur when a defensive bear makes physical contact with you. It is rarely necessary and could trigger a predatory response from the bear. Question: Do bears defend territories? Answer: Bears defend personal space.
Non-contact methods rely primarily on making loud noises (such as yelling, using an air horn or whistle), or motion-activated devices like visual and audio alarms or water sprinklers, which can deter bears without anyone being present.
If a black bear charges and attacks you, FIGHT BACK WITH EVERYTHING YOU HAVE! 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.