Chicago officials, together with the city’s Animal Care and Control department, issued a migration alert on Wednesday evening warning that millions of birds are expected to pass over the Chicago area later that night. The warning comes as national estimates predict nearly 300 million birds will traverse the United States on September 9, 2026, as part of the season’s large‑scale movement.
The alert emphasizes that the birds are traveling southward for the winter months, a routine shift that sees massive flocks crossing the Great Lakes region each fall. Chicago’s location along the migration corridor means the city will experience a noticeable increase in aerial activity after dark, prompting officials to advise residents to be aware of the phenomenon.
Overall, more than 825 million birds are slated to migrate across the continent during the fall period. While the exact species composition was not detailed, the sheer volume reflects one of the largest seasonal movements of wildlife in the United States. The city’s Animal Care and Control unit is monitoring the situation and stands ready to respond to any incidents that might arise from the dense passage of birds.
Officials did not indicate any expected disruptions to transportation or public safety, but the alert serves to inform the public about the natural event unfolding overhead. Residents are encouraged to observe the migration safely and report any unusual occurrences to city authorities.