Frants Jensen, Woods Hole Oceanographic Institution, Biology, Woods Hole, MA, United States, David Mann, Loggerhead Instruments, Sarasota, FL, United States, Aaron N. Rice, Cornell Lab of Ornithology, Bioacoustics Research Program, Ithaca, NY, United States and T. Aran Mooney, Woods Hole Oceanographic Institution, Biology, Woods Hole, United States