I'm writing a novel and I have an instance where a starving grizzly bear (in its own hunting grounds in the Alaska bush) is attacking two people even though the bear is in the vicinity of a hovering helicopter, perhaps 200 yards away. Is this realistic, or will a bear, even a starving one, run away from a helicopter if it gets that close? Or, better, how close does a helicopter have to come before it will spook a starving grizzly?
I know it's hypothetical, but any info would be helpful. Anyone?