In 1909 two wildlife safari expeditions arrived by ship in Mombasa, Kenya, within days of each other. One party was enormous and led by the adventure-loving US president Teddy Roosevelt; the other consisted of just two men and was headed by Cherry Kearton, a young British bird photographer from Yorkshire. Over several months on safari the trigger-happy president and his son Kermit killed 17 lions, 11 elephants, 20 rhino, nine giraffes, 19 zebra, more than 400 hippos, hyena and other large animals, as well as many thousands of birds and smaller animals. By contrast Kearton, the first man in the world to hunt with a camera and not a rifle,…