Striated Caracara, Saunders Island, Falkland IslandsThis striated caracara (locally known as a Johnny Rook) was guarding a gentoo penguin egg it had snatched from a nearby colony. With that little curve at the end of its beak, the caracaras struggled with actually cracking the egg and would end up rolling them up and down the beach before finally breaking through. Photographed on Saunders Island in the Falklands. Nikon D800 with Nikkor 200-400mm lens (at 200mm) ISO 400, f/5.6 at 1/1600th of a second.