This project places autonomous SONAR bioacoustic recording units at three NEON sites along the Central Flyway to listen for the faint calls migrating birds make as they fly overhead at night, and uses those SONAR recordings to train a neural network that can identify the calls to species, which most existing bird-sound classifiers are not trained to do. Battelle, through the NRSS, is providing installation, power, network connectivity, routine maintenance, and end-of-project removal at NEON’s Lyndon B.