Photographers who shoot for National Geographic have earned their keep. This guy, Ronan Donovan, dragged a rotting bison carcass into a shallow spot in a river and set up a camera in front of it. Seemingly everything in the park visited the protein snack including bald eagles, grizzlies, wolves, coyotes and anything else that could reach the tasty morsel. This guy is doing insane work. And he’s working his ass off.