Lighting can attract large numbers of night-migrating birds. Birds drawn into lights often become entrapped and circle the lit area, which can deplete their energy stores needed for migration and put them more at risk of colliding with buildings and infrastructure. Every year in the U.S., nearly 1 billion birds die from building collisions, most of them migratory species traveling at night. But here’s the hopeful part: when communities step in with science-based solutions, the results are dramatic.