Meet the Common Poorwill, a nocturnal bird from the nightjar family that is found throughout the arid west. Although some populations don’t migrate, like those in the warm southwest, northern poorwills do head to warmer climates in the winter. Peak migration is between August and October. Poorwills don’t migrate in large groups. They prefer to travel independently or in small, casual flocks, following the Rocky Mountains south to their winter home. During this time, collisions with windows are a