Nearly 1,000 Migrating Birds Die After Striking Chicago BuildingAt least 961 birds died in one night in Chicago after crashing into the windows of the McCormick Place Lakeside Center during the height of the fall migration.
Source: Nearly 1,000 Migrating Birds Die After Striking Chicago Building (https://www.nytimes.com/2023/10/08/us/birds-dead-chicago-building.html)