These two predators are battling over hunting rights. The bird on the left is a Short-eared Owl; the bird on the right is a Northern Harrier. Its a dog fight like the US Air Force only wishes they could perform. They duke it out like this often where they share hunting grounds like the marshes surrounding Padilla Bay in Washington. Shooting date; Nikon D100, Sigma EX 800mm APO, f5.6, 1/800 sec, exposure comp -1.0 EV, ISO 200.