Nayana, a 5-week-old Sri Lankan leopard (Panthera pardus kotiya) cub, looks out of a pail as she is being weighed during a medical examination by veterinary surgeons at Bratislava Zoo July 28, 2011. Nanyana and her sister Nimali were presented to the media for the first time on Thursday. REUTERS/Radovan Stoklasa (SLOVAKIA - Tags: ANIMALS)