The keepers are celebrating a very special birthday. Maleika, the old dame of the lion pride, is celebrating her 18th, and Kate and the keepers have a very special surprise for her. Across the park, animals are being encouraged to unleash their wild instincts, and perhaps the Cuban crocodiles are the most spectacular example. When they attack large prey, they perform the ultimate act of croc aggression - the death roll. The purpose of this is to tear off large chunks of meat while disorientating their target, but they often use it to fight competitors in their territory. Cayo and Fang don't disappoint, attacking the hide-wrapped log moments after it enters the water, producing the most amazing scenes. Wildlife cameraman Hamza Yassin trains his lens on the emus to try to work out what the source of their disagreement is, and Megan McCubbin tries to tempt a new joey out of its mum's pouch.