Sumatran tiger Melati looks inside a present box put out to celebrate the first birthday of her cub triplets in their enclosure at London Zoo in London, February 4, 2015. The Zoo left gifts for the cubs in their enclosure, but they were afraid to approach the boxes, leaving their mother to enjoy their contents. REUTERS/Stefan Wermuth (BRITAIN - Tags: ANIMALS ENVIRONMENT TPX IMAGES OF THE DAY)