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Bear danger is the risk encountered by humans and their pets or livestock when interacting with bears. Although most bears are alpha predators in their own habitat, most do not, under normal circumstances, hunt and feed on humans. Most bear attacks occur when the animal is defending itself against anything it perceives as a threat to itself or its territory. For instance, bear sows can become extremely aggressive if they feel their cubs are threatened. Any solitary bear is also likely to become agitated if surprised or cornered, especially while eating.〔"Bear Attacks Their Causes and Avoidance" by Stephen Herrero, pg 126 ISBN 0-941130-82-7〕 Some species are more aggressive than others; sloth bears, Asiatic black bears, and brown bears are more likely to injure people than other species, and the American black bear is comparatively timid. Separation is a key to conventional measures to minimize aggression and property damage by bears. Places such as Denali National Park in Alaska, U.S., emphasize proper techniques of food storage and garbage disposal, closures of park areas, training videos, and occasionally firearms on aggressive bears to prevent bears from claiming the lives of campers. ==Dealing with bear encounters== Before backpackers are allowed to enter an area with bears, they may be required to watch a video that teaches how to avoid encountering or agitating bears. Experts emphasize keeping your distance and making noise to avoid startling a bear as the best ways to avoid a bear attack.〔U.S. National Park service (Bear and Wildlife Safety, Denali National Park )〕 If a bear does become confrontational, the usual advice is to stand your ground, ''never'' run or turn your back on the bear, raise the arms above the head so as to appear larger, and to yell at the bear.〔US Fed News Service/(GAME COMMISSION OFFERS ADVICE ON AVOIDING BEAR CONFLICTS ) 10/5/07〕〔US Fed News Service (Stay safe in bear Country ) 6/22/07 〕 Running away or climbing a tree can activate the bear's hunting instincts and lead to it perceiving the human as prey. If a bear does charge, persons are advised to hold their ground, as most bear charges are bluffs. Finally, if a bear does attack, the usual advice is to curl into a fetal position so as to shield vital organs and appear non-threatening. If this is not effective in stopping the attack, the only option left is to fight the bear in any way you can. This advice applies to omnivores such as brown and black bears. The best way to avoid being attacked by the completely carnivorous polar bear is not to enter any area where polar bears live, or at least remain inside a hard-shell vehicle or building. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bear danger」の詳細全文を読む スポンサード リンク
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