A live webcam has been following their fishing expeditions as they beef up for a winter of hibernation to come.
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VIDEO: Tennessee man shooing Gatlinburg bear from car
VIDEO: TN man shoos bear from car in Gatlinburg
Brooks Falls in the remote area of Alaska's southern peninsula provides the perfect natural roadblock for the hungry bears to wait for a juicy meal -- migrations of fresh, 4,500-calorie sockeye salmon that are making the journey upstream to lay their eggs.
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Click here to watch the bears at work and open the portal for the Explore.org network of live cameras.