Big carnivores disappear from panda reserves

Giant pandas, which for decades were endangered, finally shed the status in 2016 thanks to huge conservation efforts. But scientists have been warning that their reserves aren’t well designed for the ecosystem as a whole - and now a group of zoologists have found that even though panda numbers have gone up since the 60s, big carnivores like leopards have almost disappeared. Bill McShea from the Smithsonian Conservation Biology Institute is one of the authors of the study, and he told Phil Sansom what’s been going on inside the panda parks...