Brown bear interaction with other animals

[oldgreengrolar]

Post information on brown bear (all subspecies) information with other animals.

[oldgreengrolar]

Here we have the first documented case of an adult male polar bear successfully defending his kill from a grizzly bear:



F) A polar bear successfully defending a marine mammal carcass from an approaching grizzly bear, Kiask Island, 2013 (photo: Robert Rockwell).


Two observations were of grizzly bears feeding on subadult polar bears but in those cases neither observer could conclusively determine whether the grizzly bears had killed them, though the details of one case strongly suggested so. Grizzly bears are known to have killed and consumed polar bears on the sea ice in the western Arctic (Taylor, 1995) and typically dominate polar bears when they interact on shore in Alaska (Miller et al., 2015). These two observations contrast though with Rockwell’s 2013 observation of an adult male polar bear successfully deterring an approaching grizzly that appeared attracted to an unidentiable marine mammal carcass the polar bear was standing on (Fig. 2f).


The State of Knowledge about Grizzly Bears (Kakenokuskwe osow Muskwa (Cree), Ursus arctos) in Northern Manitoba


www.researchgate.net/publication/359235217_The_State_of_Knowledge_about_Grizzly_Bears_Kakenokuskwe_osow_Muskwa_Cree_Ursus_arctos_in_Northern_Manitoba

beargorillarealm.proboards.com/post/7964

[oldgreengrolar]

[kevin]

GRIZZLY BEAR PREDATION ON A BULL BISON IN YELLOWSTONE NATIONAL PARK :


www.jstor.org/stable/3873220

[kevin]

The following link pretty much gives a report on brown bear interactions with ungulates and other carnivores :

sci-hub.se/https://doi.org/10.1017/9781108692571.004

[PumAcinonyx SuperCat]

Brown bear fighting 2 wolves over the carcass of a boar: 

[Bolushi]

Humans -
en.m.wikipedia.org/wiki/Wojtek_(bear)

[lincoln]

Grizzly interacting with Muskox

Attachments:

[oldgreengrolar]

Jul 21, 2023 22:55:32 GMT Bolushi said:

Humans -
en.m.wikipedia.org/wiki/Wojtek_(bear)

The bear that when for war:

[oldgreengrolar]

Jul 22, 2023 9:32:46 GMT lincoln said:

Grizzly interacting with Muskox

Barren ground grizzlies surprisingly target musk oxen more than the larger and stronger polar bear does.

I wish there were actual pictures of male polar bears killing musk oxens. There are accounts which say they are capable of doing so, mainly from the Great Bear of Almanac.

[PumAcinonyx SuperCat]

Series of photographs of a grizzly bear pursuing an American bison in Yellowstone National Park: 


























Taken From: Grizzly Bear Chases Down a Bison on a Road in Yellowstone Park: www.fieldandstream.com/photos/gallery/hunting/2010/11/amateur-photographer-captures-grizzly-bear-chasing-bison-down-highway/

[Hardcastle]

Fuck that bison's life honestly, I believe it got burned in a fire earlier that day.

[oldgreengrolar]

The bison managed to escape. Ursus Artos (a respectable brown bear enthusiast) said that the brown bear might be a worst predator than he thought after seeing this account.

This does not mean that brown bears are weak. They are very powerful but just comparatively poor predators compared to big cats and wolves.

[PumAcinonyx SuperCat]

Jul 28, 2023 2:59:22 GMT oldgreengrolar said:

The bison managed to escape. Ursus Artos (a respectable brown bear enthusiast) said that the brown bear might be a worst predator than he thought after seeing this account.

This does not mean that brown bears are weak. They are very powerful but just comparatively poor predators compared to big cats and wolves.

Yes, that is correct. 

When we talk about hunting large prey animals in general (equines, cervines, suines, and bovines), bears although more powerful than cats and dogs actually scale below them. 

Dogs (wild canines) are superior to bears. And big cats in turn are FAR superior to wild canids. That's why on EVERY continent where a top wild cattle species/type coexists with a big cat, bear, and dog species, the big cat, (and not the dog or bear) is the one that is best suited to preying on healthy adults of said cattle species. 



For example: 

In Asia, tigers are by far and away the best predators at hunting healthy adult gaurs and moose (far better than Ussuri brown bears and sloth bears) 

In Africa, no other predator is nearly as good at hunting healthy adult cape buffaloes as the King of beasts 

In South America, jaguars cause a great deal of trouble for cattle ranchers (they most likely do a better job than spectacled bears since I've heard those bears can be carnivorous and attack large prey animals at times). 


In view of this, it is very clear, and we all can agree that in North America, the continent's top cat takes the lead in hunting large and dangerous game in general, whether it be cervine, equine, suine, or bovine. And it does so by a landslide. 

So, when it comes to hunting healthy adult American bison, cougars would unquestionably be far superior to wolf packs (that ALMOST ALWAYS ONLY prey on extraordinarily weakened individuals anyway) which in turn are considerably better than grizzly bears. 


The only proper ranking would be: 


Cougar >>>>>> Wolf pack >> Grizzly/brown bears. 


That sits perfectly well with the "Big Cat >>>>>> Wild canid >> Bear rule. 

But in terms of actual power in a fight among one another, the rule is: Bear >>>> Big Cat >>>>> Wild Canid.

[Deleted]

Jul 28, 2023 8:27:38 GMT PumAcinonyx SuperCat said:

Jul 28, 2023 2:59:22 GMT oldgreengrolar said:

The bison managed to escape. Ursus Artos (a respectable brown bear enthusiast) said that the brown bear might be a worst predator than he thought after seeing this account.

This does not mean that brown bears are weak. They are very powerful but just comparatively poor predators compared to big cats and wolves.

So, when it comes to hunting healthy adult American bison, cougars would unquestionably be far superior to wolf packs (that ALMOST ALWAYS ONLY prey on extraordinarily weakened individuals anyway) which in turn are considerably better than grizzly bears.

I wouldn't agree with that. Accounts of cougars killing bison at all (young, weak, sick etc.) are rare. At least wolves actually do kill bison from time-to-time, at a far higher rate than cougars do.

And while big cats can certainly kill large herbivores (maybe better than dogs in some scenarios), they tend to be a less successful animal at the end of the day. AWDs have a success rate of 90%. That makes them the most effective wild land predator on Earth. Lions have a success rate of 25-30%, Cougars 20%, and Tigers a mere 5%. Now, I'm not saying that other dog species have the same success rate as the AWD (because they don't). Wolves range from 5-28%, Dholes about 20%.

Every dog I just mentioned -roughly- had a higher success rate than the cats found in the same region e.g. lion 25%, AWD 90%. Of course the wolf one is arguable, I'd like to know the success rate of specific wolves native to NA.

Anyways what I'm saying is, while certain cats may be more effective at taking large herbivores (debatable), that doesn't make them more successful predators in general.

P.S. Cougars usually lose to Wolf packs and Bears:

news.mongabay.com/2018/02/mountain-lions-often-lose-to-wolves-and-bears-study-finds/