“At the building that has long been the city’s most notorious bird killer, a sprawling lakefront conference venue that claimed almost a thousand birds on a single day in October 2023, new protections were in place.

The vast glass windows and doors of the building, called Lakeside Center at McCormick Place, are overlaid with a pattern of close, opaque dots. Applied last summer to help birds perceive the glass, the treatment’s early results are nothing short of remarkable. During fall migration, deaths were down by about 95 percent when compared with the two previous autumns.

Now monitoring is underway during the first spring migration since the dots.”

From New York Times.