AK fish and game recently made a pass through some borough in the interior, doing their predator control via helicopter. Apparently the wolves are migrating to this location fro mall over the region to prey on a particular herd of caribou that is both vital for the humans living in the area and also currently having a herd-wide health problem -- some sort of virus. Since they're all a bit weak and sickly, the humans have temporarily stopped hunting them, but the kills to predators are increasing at an unsustainable rate. They say if the wolves manage to eradicate the herd it will be the first recorded extinction of a subspecies by non-human overhunting.