Animals: Lions have their own unique roars that individuals use to recognise each other, study finds

Every lion has its own unique roar, one that lets the'kings of the jungle' recognise each other and could be used to track population movements, a study has found. Researchers from Oxford used machine learning to analyse the roars of various lions -- picking out the distinguishing frequency that can be used to tell them apart. According to the experts, lions' calls are usually issued in a set -- with one or two soft moans followed by several loud, full-throated roars and finishing with grunts. Previous research had suggested that lions could distinguish their peer's roars from each other -- allowing them to identify distant friends and hostile neighbours. However, it had not previously been clear what aspects of the calls' structure allowed them to discriminate between those made by different individuals.