Nell Greenfieldboyce October 05, 2017 20171005_atc_light_pollution_can_impact_noctural_bird_migration.mp3 Listen • 3:21 20171005_atc_light_pollution_can_impact_noctural_bird_migration.mp3 Copyright 2017 NPR. To see more, visit http://www.npr.org/. Nell Greenfieldboyce