Graphic Evidence of Bears Killing Young Bears


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U.S.A.-(– On May 22, 2022, visitors at Yellowstone national park witnessed a common, but seldom seen, killing of a young grizzly by a much larger adult boar. The mother of the young bear was also seen attacking the offspring. Some people think she was attempting to convince the young bear to leave the area.

The mortal wounding of the young bear, which was the size of an average human, (about 150 lbs) is brutal. The speed and power of the attack are sobering to watch.

The video shows how immensely powerful a boar grizzly is. This boar was estimated at over 500 lbs.

Less than a month later, three more cubs were almost certainly killed by a large boar.  On June 16, grizzly 793, known as “Blondie” likely had her three cubs killed by a big boar.

On Saturday morning, a bear thought to be Blondie was seen moving rapidly around an area in the park.

“The thought is that Blondie lost her cubs to a male bear on Friday night or early Saturday morning and was looking for them,” Bayles said on social media this week.

Bayles told one of his social media followers that a male bear was likely cause of the cubs’ demise.

“It is the single leading cause of baby bears,” Bayles said.

Studies of cub mortality show about 25% of sub-adult bears are killed by other bears every year. Nearly all the killing is done by large boars.

The study above was for grizzly bears, but black bears boars kill cubs with as much gusto. Black bear cub cannibalism

 Abstract: From 1982 to 1985, 23 Arizona black bear (Ursus americanus) cubs were equipped with motion-sensitive, breakaway radiocollars while in winter dens. Eleven (48%) of these cubs died, but cause of death was determined in only 8 cases because of collar loss. Fifty percent of these deaths were the result of cannibalism by other bears.

The phenomena was observed in a study Raph Flowers, the famous professional black bear hunter and trapper, was involved in. From Bears & Flowers, page 135, in a radio-collar survey done in February of 1982, of denned sow black bears:

“We also picked up the signal from the largest male bear on the island – a 300 lb bruiser – and were surprised to find him out of his den and moving about in February. 

The objective of his mid-winter wanderings became apparent the following spring when it was determined that he had been roving the island, searching out denned females with cubs. At one den he killed and partly devoured the mother bear, and also made breakfast of her two cubs. At the den containing three cubs, he had killed and devoured them all, although the mother bear had escaped.”

Bear cubs are about 1/3 of the population, before the end of hibernation. Roughly 8% of the bear population every year is adult bears.  For every thousand bears, about 80 are killed each year by other bears.

Numerous incidents of polar bear predation on cubs and sub-adults have been observed. What percentage of young polar bears are killed by other bears is difficult to measure. From

Intraspecific killing of one polar bear (Ursus maritimus) by another, including both infanticide and predation on older bears, as well as cannibalism, has long been known to Inuit hunters in Canada and Greenland, and several observations have been reported in the scientific literature (Lunn and Stenhouse, 1985; Taylor et al., 1985; Derocher and Wiig, 1999; Dyck and Daley, 2002; Amstrup et al., 2006; Stone and Derocher, 2007; Stirling et al., 2008). Both male and female adult polar bears are also known to scavenge on the carcasses of polar bears killed and skinned by humans (e.g., Larsen and Kjos-Hanssen, 1983). Most intraspecific kill-ing is focused on cubs and subadults, though some adult females are known to have been specifically preyed upon as well (Taylor et al., 1985; Amstrup et al., 2006; Stirling et al., 2008). In all observations of such killings recorded to date, the predators have been adult males. When fully mature, adult male polar bears are roughly twice the size of adult females (Kingsley, 1979; Derocher et al., 2005).

Much of the false image of bears as innocent furry forest creatures, as portrayed by Hanna-Barbera with Yogi and Boo Boo, or Disney in The Jungle Book, can be corrected with the knowledge of big boar bears as cub killers. In the real world, if Yogi and Boo Boo had met, it is likely Yogi would have killed Boo Boo.

Velma Flowers, the wife of Ralph Flowers, who made the family livelihood by the commercial hunting and trapping of bears which were doing immense damage to trees in Washington State, was not immune. She strongly protested the killing of cubs. Then she strongly called for the killing of large boars, after she had complained of Ralph killing an orphaned cub.  From The Education of a Bear Hunter, P. 125, from his wife, Velma:

She then explained that this bear was in a different situation; he was a big bear and probably a mean old daddy bear. He had probably killed some cubs himself and was undoubtedly guilty of destroying many fine trees, while the little cubs had done nothing to deserve such a sad fate.

There is evidence that the harvest of large boars increases the overall bear population. From The Dynamics and Regulation of Black Bear Ursus americanus Populations in Northern Alberta:

Numbers of black bears on the study area varied little from 1968 through 1971. The removal of 26 large adult males in 1971 and 1972 was followed by an apparent increase in the bear population in 1972 and 1973, primarily in the subadult component. Alternate years of high cub production in 1968,1970 and 1972 probably were solely a function of the number of adult females breeding. Evidence from other studies indicates no significant change in annual litter size.

Human hunters disproportionately harvest large boars. They open up niches for more cub survival, with increases in the population of bears and increases in the harvest of bears at the same time.

It is likely the regulated hunting of bears is better for bear populations than allowing the unregulated killing of large numbers of cubs by mature boars.

About Dean Weingarten:

Dean Weingarten has been a peace officer, a military officer, was on the University of Wisconsin Pistol Team for four years, and was first certified to teach firearms safety in 1973. He taught the Arizona concealed carry course for fifteen years until the goal of Constitutional Carry was attained. He has degrees in meteorology and mining engineering, and retired from the Department of Defense after a 30 year career in Army Research, Development, Testing, and Evaluation.

Dean Weingarten

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I seem to remember reading an article years ago in which the author made the statement that male bears will kill cubs to cause the female bear to come into heat again . Does that ring a bell with anyone else ?

Last edited 1 month ago by Oldvet

I used to work closely with several biologists who were deep into “grizzly bear recovery” in the North Cascades range of Washington and Oregon. I don’t recall hearing any discussion of intraspecies predation in ANY of the biologists’ many working reports that I reviewed. Still, it’s not surprising that research and observations have established that the bears themselves are a significant mortality factor for their own genera. In the last few years I’ve read a few accounts of groups of dolphin males killing nursing juvenile dolphins. Reports have theorized that killing the offspring will cause the female to become receptive… Read more »


Ope … Does that make Polar Bears White Supremacists ?


In polar bear kingdom…..all white, zero gun violence. Just an observation of facts.

Country Boy

ban bears with guns?


StL… Good point !


Hey Boo Boo… You look like… a pic-a-nic basket… to me…”

I bet you read it in Yogi’s voice…


Those of us who have engaged in the science of wildlife conservation under the North American Model for Wlldlife Management understand one truth: life is often nasty, short and brutish. Any good hunter education program will show the mortality rates of wildlife. The vast majority of mammals and birds in the wild die of starvation, disease and accident. Science based harvesting by hunters is a controlled and methodical approach to managing and balancing populations. Those of us who have been able to observe the cycle in the wild know one truth: the high powered, well placed bullet is far preferable… Read more »


I agree with you a 100%.


It is just sad that even the animals are behaving badly.Makes you wonder if evil is infiltrating all on this planet!


They are just behaving naturally .

Matt in Oklahoma

This really ain’t nothing new. I guess folks just don’t know how things work with bears. Probably needs to be posted on FB so it’ll become truth

Matt in Oklahoma

I’m burning my grocery store down while wearing a BBLM shirt to show solidarity

Deplorable Bill

Yup, and you can bet that most of the anti gun, anti hunters have no clue about bear predation on bear cubs. Nature can seem cruel but without it things would get out of balance and famine, disease etc. would greatly increase. Too much of any species causes major problems. If we successfully hunt only boars the bear population will increase. The bears will need to eat. If the bear population grew by 90% there would not be enough naturally occurring food to feed them. Therefore the more leftst, communist/woke, tree huggers who visit grizzly country the more of them… Read more »


The best thing about having bears or coyotes hanging around is they provide perfect security. Nobody swipes your stuff.


This biology has been known for years. Actually not much different than human behavior, but we call it war.


The alpha couple in a wolf pack often kill off the cubs born to other pack members. Nature isn’t usually warm and fuzzy. It’s not talking animals working in harmony with other species. It’s kill or die.

Country Boy

So….bears will be bears?


naaa cant be ,big cats will kill offspring of other big cats (lions,tigers..)could it be law of the jungle


Bear mortality due to predation by bears is commonly understood by those in rural areas. When British Columbia initiated a near ban on grizzly hunting, several years later, it was very difficult to find black bears while sightings of grizzlies on both Spring and Fall hunts was common. The near religious belief by government and university biologists that grizzlies were somehow sacred and endangered led to a maximum phase grizzly population and a critically low black bear population. This also led to the need for the local population to extralegal means of controlling the excess bear communities by shooting the… Read more »


bet if you knew population density in area you could predict it based on available food