A couple of years ago I was fishing a lake in Rocky Mountain National Park that has Greenback Cutthroat. I was sitting along the shore line waiting for the fish to start rising to a midge hatch when I see a Bald Eagle swoop down the lake, drop in, and pull a nice Greenback out. As he flew away I couldn't help but wonder, "What happens when one endangered specie starts feeding on another endangered specie?"