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August Froehlich of the Nature Conservancy's Ohio office in Dublin attaches microphone to roof of his car, before setting off on a 30-mile drive to record bat sounds near Norwalk in Huron County. Froehlich is hoping to record the Indiana bat to help determine where female Indiana bats and their pups spend the summer in Ohio. The Indiana bat is a federally endangered species found in Ohio and 13 other states. (Bob Downing/Akron Beacon Journal)
The device held by August Froehlich of the Nature Conservancy records bat echolocation calls when the flying mammals are out at night hunting insects. The device makes the digital sounds into chirps and cheeps that can be heard by humans. Software will be used later to analyze the recordings to determine what bat species were recorded. The device also records GPS coordinates. (Bob Downing/Akron Beacon Journal)