Every year, 5 billion migratory birds travel through Chicago. 1 billion of those birds die by flying into the glass windows. This makes Chicago the most dangerous city in America for migratory birds.
The dead birds are brought to the Field Musuem for research and the injured birds are taken to the Willowbrook Wildlife Rehabilitation Center.
The Chicago Bird Collision Monitors are a group of volunteers who patrol downtown in the early hours of the morning looking for dead or injured birds.
Annette Prince answers a call made to the Chicago Bird Collision Monitors about an injured bird in downtown Chicago.
Annette Prince captures a stunned bird near the Daley Plaza in downtown Chicago.
Willowbrook staff examines the flight capabilities of each injured bird.
The injured birds are treated for their injuries and monitored during their recovery.
A bird at the Willowbrook Wildlife Rehabilitation Center is fitted for a tag and prepared for release.
The rehabilitated birds are released back into the wild.