Male chimp, Kalema, is photographed at the Ngamba Island Chimpanzee Sanctuary in Lake Victoria, Uganda.  Kalema is a happy and playful individual when among the younger chimps, although he is the biggest in the group. He doesn&rsquo;t enjoy the rough and tumble of the older males. He can be quite shy and is often seen sitting and observing the activity around him from a distance. 03/15 Julia Cumes/IFAW