On the North Slope of Alaska ... the Inupiat don’t hunt much else, but an enormous flock of eiders is fair game. J.R. Nungasak shoots at the sea ducks as they pass over the ice.

A sea otter feeding in Glacier Bay, Alaska photographed by scientist Jim ... Bald eagles are known to hunt otter pups when other food is scarce. Biologist Jim Bodkin, who studies the otters ...