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These are some of the approximately 1,000 birds that slammed into McCormick Place in Chicago on Oct. 5, 2023. That was a night and morning when especially high numbers of birds were migrating along Lake Michigan. The building's windows have since been treated with a film that makes them visible to birds. Very few birds have hit the windows since then.

217 Today: Midwest light pollution kills migrating birds, but scientists know how you can help

The 217 Today Podcast