Migration season is when Annette Prince and the other Chicago Collision Bird Monitors are the busiest, as Mother Nature literally slams into the urban environment. Annette assembles volunteers as they arrive downtown before sunrise, looking for birds that have flown into skyscrapers, before heading to their day jobs. The birds that survive are sent away for a stay at the Willowbrook Wildlife Rehabilitation Center. Broken Flight introduces us to the volunteers, scientists and veterinarians who rescue, study and catalog these amazing avian species.