Yes they will.
they eat moose and polar bear.
A grizzly bear would only eat a dead moose because it does not like to hunt an animal that is quite large and can fight back. Grizzly bears and black bears prefer to kill and eat weak moose, moose calf, or an injured moose. A grizzly bear can sometimes kill a moose if it was very angry and strong.
No bear would dare mess with, let alone kill a bull moose on the rut.
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It is highly unlike that a polar bear would even get a chance to kill a moose because these animals live in two entirely different biomes. You would not see a polar bear in the boreal or transition-boreal forests, nor would you find a moose in the arctic near the coastline. For that reason, no a polar bear would not nor could not kill a moose. However, as far as human-ability to be very imaginative, it is likely that a polar bear could kill a moose.
The polar bear might have a chance to win because it can tear up the moose. With its strength and size advantage, a polar bear could break a moose's head with one swipe of its claws and a shatter of its horns with paws too. However, a moose would often run off from the polar bear unless if it got cornered. If that happens, the moose would try to kill the polar bear with its antlers, but the polar bear would kill it first.Probably the polar bear because when the moose tries hitting it with antlers, the polar bear would swipe its head to death.Another AnswerThe polar bear would most likely win this fight. A moose has those antlers that are strong enough to knock down a lion or a black bear with them if contacted at them. But a polar bear has those strengths and power with its claws to blow down the moose's head before the moose had a good chance to gore the polar bear to death. However, a polar bear can even kill and take down a musk ox without getting badly injured because a polar bear's size plus strength is good enough to kill such animals. A grizzly bear might also have a chance to kill a moose because the grizzly bear has been known to attack adult bull moose and kill them with their strength of claws. If a polar bear fight a moose, the polar bear would end up having a good prey to eat.
A single wolf would not be able to kill and eat an adult, healthy moose. But a pack would.
Possibly, yes: however the bear is more likely get injured than killed if he took on such a beast, simply because he would rather live than do a stupid thing like fight such a large bull moose to the death. A mature bull moose's antlers are like daggers, and an angry bull moose that has a bone to pick with a bear that won't get out of its way will most likely get injured or even killed. In order to cause death to a bear, the moose would have to gore the bear through the ribs or in the abdomen in order to cause serious injury enough for the bear to die either right there in the scene of the crime or after the fact. Moose are big animals, especially the bulls, and are great fighters, and any ordinary bear, no matter the size or health condition, would think twice about taking on a moose. Bears may take a chance to kill and eat moose calves, but they would have Momma moose to contend with if that ever happens, and she can be just as fierce and dangerous as a bull moose, even if she doesn't have antlers.
Cause they had plenty of alligator chicken deer.
the ecological niche of a moose would be to eat grass
A single wolf would not be able to kill and eat an adult, healthy moose. But a pack would.
Yes, if the kodiak bear avoided the moose's hooves and antlers (if it is a bull moose). Even a grizzly bear or an alaskan brown bear could kill a bull moose, but not when it is on the rut.