Grizzly bear looking for fish in river gets spooked by unseen threat

ursus arctos horribilis brown bear bear ursus grizzly british columbia alaska bella coola wildlife mammal omnivore ecotourism male carnivore canada animal riverbank fauna wilderness predator habitat walk cautious salmon wild ecology nature arctos river threat claw look environment fur solitary horribilis fish spooked danger lone forest autumn strong behavior strength bank injury powerful behaviour