Adventure

Yellowstone Has Most Dangerous Bears

Grizzlies habituated to human food

A new report from the U.S. Fish and Wildlife Service indicates that Yellowstone's grizzly bears are more dangerous than those in Glacier National Park, despite Glacier's larger bear population. In 2011, 17 Glacier grizzlies charged humans, compared to 62 in Yellowstone, where bears have killed four visitors in the last two years. Greater habituation to humans, along with Yellowstone's dwindling supplies of pine trees and cutthroat trout, have altered the bears' diets and led to human-grizzly confrontations. The study, going back to 1990, shows that 38 percent of charges involved human food. The bulk of charge victims have been lone hikers not carrying bear spray.

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