Snarling Leopard Audio (audio) Princeton University Share Print E-Mail Loading audio... Caption Princeton ecologist Justine Atkins simulated the return of predators to Gorongosa National Park by playing recordings of leopard calls and distributing simulated scat and urine. She used a commercially available fake lion poop product called Silent Roar and 2-phenylethylamine, which is the component of carnivore urine that has been found to elicit an innate fear response in prey species. The researchers used GPS collars to track the movements of bushbuck in the 48 hours before and after these predator simulation experiments, and they found that the herbivores in woody areas showed no changes, but bushbuck in the floodplain retreated into woody areas. Credit Audio courtesy of Macauley Library at Cornell Usage Restrictions Editorial use only Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.