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Post by OldGreenGrolar on Jan 5, 2020 9:36:45 GMT -5
I can see this brown bear subspecies is like a cross between a grizzly and panda which explains why American Inland grizzlies and Ussuri brown bears look similar yet have some facial difference. I think barren ground grizzly to Tibetan blue bear is like American Inland grizzly to Ussuri brown bear. * like a cross between a grizzly and panda... what? It is in the article you posted. I underline it.
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Post by brobear on Jan 6, 2020 0:58:05 GMT -5
I can see this brown bear subspecies is like a cross between a grizzly and panda which explains why American Inland grizzlies and Ussuri brown bears look similar yet have some facial difference. I think barren ground grizzly to Tibetan blue bear is like American Inland grizzly to Ussuri brown bear. * like a cross between a grizzly and panda... what? It is in the article you posted. I underline it. Quote: With a luxurious blue-grey coat, big white collar, black legs and black teddy-bear ears, they can look almost like a cross between a grizzly and a panda.
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Post by brobear on May 16, 2020 8:16:31 GMT -5
www.bearconservation.org.uk/tibetan-blue-bear/ BEAR CONSERVATION - WORKING FOR BEARS - Tibetan blue bear. Accepted scientific name: Ursus arctos pruinosus (Blyth, 1854) Description: Whilst the fur of the bear is essentially black the outer guard hairs give the bear a blue / grey appearance. Range: Historically found mainly on the alpine eastern Tibetan plateau (4,500 to 5,000 metres), in eastern Tibet, western China, Nepal and occasionally in Bhutan. Remaining bears in the wild seem to be confined to eastern Tibet and to Bhutan. A sighting was reported on the northern plateau near the historic border between Tibet and China in 2013. A further confirmed sighting was made in a remote valley in eastern Tibet in June 2019. Habitat: Lives in mountainous regions at high altitudes close to the tree line. Status: Thought to be very rare. Listed in Appendix I of CITES and in the USA trade in blue bear specimens or parts is restricted by the Endangered Species Act. Life span: Unknown but assumed to be around 20 to 30 years in common with other brown bears in the wild. Food: Small mammals, particularly pika. Allegedly will kill and eat livestock and enter nomad dwellings to take food. Probably also eats vegetation and pine nuts when and where avaialble but little is known about the bears’ diet. Behaviour: Probably the least known and least studied of all brown bear subspecies. Evidence indicates that the Tibetan blue bear is very shy of human contact and therefore very seldom observed. Threats: Threatened by the use of bear bile in Chinese medicine and by habitat loss and human conflict. Conserving Tibetan brown bears in Tibet Page updated 10 January 2020
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Post by OldGreenGrolar on May 16, 2020 9:03:22 GMT -5
As aggressive as this bear is it is still one of the most understudied of the brown bear subspecies. Just because an animal is shy towards humans doesn’t mean it is shy towards other animals.
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Post by brobear on Jun 5, 2020 3:34:01 GMT -5
www.ncbi.nlm.nih.gov/pubmed/21174359 Food habits and hunting patterns of Tibetan brown bear during warm seasons in Kekexili region on Qinghai-Tibetan Plateau. Tibetan brown bear (Ursus arctos pruinosus) is an endemic subspecies of brown bear on the Qinghai-Tibetan plateau. We once reported a preliminary study on the summer food habit of Tibetan brown bear from July to August, 2005 in the Kekexili (Hoh Xil).. However, the hunting modes of the Tibetan brawn bear have not been reported. From July to August, 2009, we collected additional data on food habits and hunting patterns of Tibetan brown bear in the Kekexili region. We found Tibetan brown bears are more raptatorial than vegetarian, and their basal food was plateau pika (Ochotona curzoniae), relative frequency occurrence of pika in the fecal residual of brawn bear was 37.3%, dry weight of pika residuals was 44.7%, respectively, followed by wild yak (Bos grunniens) , 18.7% and 30.2%, and Tibetan antelope (Pantholops hodgsoni) 15.0% and 16.2%. Both prey actively mode and scavenge mode were used by Tibetan brown bears in Kekexili. Tibetan brawn bears actively dug and hunted for pika and scavenged bodies of wild yak, Tibetan antelope and Tibetan gazelle. We observed that Tibetan brawn bears spent about 10% of their time to dig and to hunt for pika but we had never seen Tibetan brawn bears actively hunted large mammals such as wild yak, Tibetan antelope and Tibetan gazelle. The total amount of Tibetan antelope, Tibetan gazelle and wild yak ingested by Tibetan brown bear through scavenge was about the same amount of Plateau pika and Himalayan marmot (Marmota himalayana) eaten by the bear. The Tibetan "blue bear" is more carnivorous than the Himalayan "red bear".
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Post by brobear on Jun 5, 2020 4:06:43 GMT -5
Bears of the World by Paul Ward and Suzanne Kynaston. The relative importance of meat, however, should not be underestimated; in terms of energy, meat has a greater yield on a weight for weight basis than plants. In Tibet, brown bears are more actively predacious than in other areas and meat forms a greater proportion of the diet. In contrast, Japanese brown bears eat almost no meat; one study showed that 98.7% of the diet was made up of vegetative material, particularly fruits, berries, acorns and hogs funnel. The remaining 1.3% comprised flying insects that aggregate under rocks around lake shores and an occasional sample of local livestock. Brown bears living along coastlines have access to the stranded bodies of sea mammals, invertebrates ( e.g. molluscs and crabs ), and vegetation ( e.g. seaweed ). Again, the Tibetan "blue bear" is more carnivorous than the Himalayan "red bear".
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Post by OldGreenGrolar on Jun 5, 2020 8:57:12 GMT -5
That is also why the Tibetan blue bear seems to have a narrower skull than the more herbivorous Himalayan brown (red) bear.
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Post by OldGreenGrolar on Aug 6, 2020 10:29:13 GMT -5
Posted by Brobear on Carnivora.
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Post by brobear on Aug 17, 2020 9:12:15 GMT -5
tibetnature.net/en/tibetan-brown-bear/ The omnivorous Brown Bear can eat up to 11 to 16 kilograms (25 to 35 pounds) of food per day, or roughly two percent of its body weight. The bulk of the Tibetan Brown Bear’s diet consists of pikas, green and dry grass, and roots. The Tibetan Brown Bear also eats ungulates (probably scavenged) like blue sheep, argali, chiru, and yaks, as well as marmots, tubers, herbs, and insects. The Tibetan Brown Bear occasionally attacks livestock. *The Tibetan brown bear preys upon the "Blue Sheep" but this wild sheep's principle enemy is the snow leopard. tibetnature.net/en/blue-sheep/ The Sheep’s natural predators include snow leopards, wolves, and common leopards. The Blue Sheep is the Snow Leopard’s principal prey on the Tibetan Plateau. Blue sheep freeze when a potential predator is in their vicinity. Their excellent camouflage often results in them being overlooked as part of the landscape. Blue sheep flee if a predator does manage to spot them.
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Post by OldGreenGrolar on Aug 17, 2020 9:14:24 GMT -5
Reply 29. The Tibetan brown bear is more omnivorous than the barren ground grizly bear and even the extinct Carlifornian grizzly bear.
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Post by brobear on Aug 17, 2020 9:23:01 GMT -5
The Tibetan brown bear preys upon the The Tibetan antelope. extravagantyak.com/products/tibetan-antelope-chiru Extraordinarily vigilant and wary creatures, Tibetan antelope have hair-trigger alertness. At the first sign of a predator, the Chiru will bolt and be off like a bullet. Despite the thin air at such a high elevation, Tibetan antelopes are serious runners. The air sacs in their nostrils permit them to run up to eighty kilometres per hour, with unparalleled endurance. Their primary predators are wolves and snow leopards, and foxes which attack newborn calves.
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Post by brobear on Aug 17, 2020 9:33:58 GMT -5
onekindplanet.org/animal/yak/ Historically, the main natural predator of the wild yak has been the Tibetan Wolf, but Brown Bears and Snow Leopards have also been reported to predate on Yak in some areas. *I can assure you that any wild yak killed by a Tibetan brown bear or a snow leopard is either a young calf or a badly disabled adult.
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Post by OldGreenGrolar on Aug 17, 2020 10:45:56 GMT -5
I think a Tibetan blue bear is generally too small to take on a yak. Barren ground grizzlies have taken down musk oxens twice their weight but I think a yak is a lot heavier.
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Post by brobear on Aug 17, 2020 11:06:17 GMT -5
I think a Tibetan blue bear is generally too small to take on a yak. Barren ground grizzlies have taken down musk oxens twice their weight but I think a yak is a lot heavier. The wild yak actually rivals the gaur as the largest living bovine. The Tibetan brown bear is ( probably ) within the size range of a sloth bear. In reply #32 I clearly stated: Quote: I can assure you that any wild yak killed by a Tibetan brown bear or a snow leopard is either a young calf or a badly disabled adult.
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Post by OldGreenGrolar on Oct 27, 2020 8:19:59 GMT -5
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Post by OldGreenGrolar on Feb 17, 2021 7:11:14 GMT -5
I looks like some tigers have been discovered in the Himalayan brown bear (red bear) territory. There is limited info on the Tibetan blue bear but they do not live far from the red bears.
My statement: a tiger can kill even an adult male Tibetan blue bear. However, this brown bear subspecies is way more aggressive than its red cousin and will repel the tigers most times.
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Post by brobear on Feb 17, 2021 8:56:11 GMT -5
Quote: I looks like some tigers have been discovered in the Himalayan brown bear (red bear) territory. *Did you read this somewhere?
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Post by OldGreenGrolar on Feb 17, 2021 10:09:21 GMT -5
Quote: I looks like some tigers have been discovered in the Himalayan brown bear (red bear) territory. *Did you read this somewhere? I read your post in the Himalayan brown bear thread.
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Post by brobear on Feb 17, 2021 10:37:58 GMT -5
Quote: I looks like some tigers have been discovered in the Himalayan brown bear (red bear) territory. *Did you read this somewhere? I read your post in the Himalayan brown bear thread. Ahhh...OK. Same group of mountains.
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Post by brobear on Mar 21, 2022 1:36:09 GMT -5
www.ncbi.nlm.nih.gov/pubmed/21174359 Food habits and hunting patterns of Tibetan brown bear during warm seasons in Kekexili region on Qinghai-Tibetan Plateau. Tibetan brown bear (Ursus arctos pruinosus) is an endemic subspecies of brown bear on the Qinghai-Tibetan plateau. We once reported a preliminary study on the summer food habit of Tibetan brown bear from July to August, 2005 in the Kekexili (Hoh Xil).. However, the hunting modes of the Tibetan brawn bear have not been reported. From July to August, 2009, we collected additional data on food habits and hunting patterns of Tibetan brown bear in the Kekexili region. We found Tibetan brown bears are more raptatorial than vegetarian, and their basal food was plateau pika (Ochotona curzoniae), relative frequency occurrence of pika in the fecal residual of brawn bear was 37.3%, dry weight of pika residuals was 44.7%, respectively, followed by wild yak (Bos grunniens) , 18.7% and 30.2%, and Tibetan antelope (Pantholops hodgsoni) 15.0% and 16.2%. Both prey actively mode and scavenge mode were used by Tibetan brown bears in Kekexili. Tibetan brawn bears actively dug and hunted for pika and scavenged bodies of wild yak, Tibetan antelope and Tibetan gazelle. We observed that Tibetan brawn bears spent about 10% of their time to dig and to hunt for pika but we had never seen Tibetan brawn bears actively hunted large mammals such as wild yak, Tibetan antelope and Tibetan gazelle. The total amount of Tibetan antelope, Tibetan gazelle and wild yak ingested by Tibetan brown bear through scavenge was about the same amount of Plateau pika and Himalayan marmot (Marmota himalayana) eaten by the bear. The Tibetan "blue bear" is more carnivorous than the Himalayan "red bear". While the omnivorous Himalayan "red bear" is far more vegetarian than the Tibetan "blue bear", both bears spend a great deal of their energies digging in very hard, rocky, and often frozen ground for food. Note too that the Tibetan brown bear also kills livestock and juvenile yaks, although most of his red meat is acquired from scavenging. Quote from Reply #2, "The blue bear is known to live in high altitudes close to the tree line. Unlike the other bears found in the region, it often killed yaks, and hence the yak herders referred to it as the yak dhom (yak bear) or lha (mountain) dhom."
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