Calls of the wild offer sound guidance for protecting animals
Jonathan Growcott’s “happy place” is bouncing across the African savanna in a 4×4 vehicle. As a large-carnivore biologist, he tracks predators in the wild. It’s tough work; these animals can be hard to find. Common methods often involve driving for hours in search of footprints or droppings. Some researchers set up camera traps in hopes of snapping photos of passing animals. Growcott felt these still missed something. Maybe scientists could do more than just look for signs of critters. Perhaps they could listen for them, too. “Species like lions, leopards and hyenas produce some of the most recognizable sounds in the animal kingdom,” notes Growcott. What’s more: “These sounds travel many kilometers [miles].” Jonathan Growcott and colleagues set up 50 pairs of camera traps and microphones in East Africa in Nyerere National Park. Combining these two technologies allowed the team to pair photographs with unique roars to identify individual leopards.Charlotte Searle And these critters are far from the only sound-makers. Birds, mammals and insects are, too. So are reptiles, amphibians, fish — even crustaceans. Some …









