723 Million Birds Migrating Across the US This Week With 5.3 Million Expected Over Michigan Wednesday Night as Lights Out Alert Issued Statewide
MICHIGAN — A massive bird migration event is underway across the United States this week, with BirdCast estimating a staggering 723 million birds expected to be in flight across the country over the next three nights. For Michigan specifically, Wednesday night April 22 is the single biggest migration night of the stretch, with AeroEco Lab anticipating 5.3 million birds passing over the state while residents sleep. A Lights Out Alert has been issued for all of Michigan from 11 PM to 6 AM to help protect migrating birds from dangerous artificial light exposure during the peak flight window.
Wednesday Night Brings 5.3 Million Birds Over Michigan
The three-night migration forecast shows a dramatic ramp-up in bird activity over Michigan. Tuesday night April 21 saw an estimated 1.6 million birds in flight over the state, but Wednesday night April 22 surges to a peak of 5.3 million birds anticipated according to AeroEco Lab data. Thursday night April 23 estimates are still to be determined as forecasters continue refining the migration outlook.
The sheer volume of birds moving through Michigan’s airspace on Wednesday night makes it one of the more significant single-night migration events the state will see during the entire spring season.
Detroit, Grand Rapids, and Warren See Thousands of Birds Overhead
City-level bird forecast data breaks down the migration numbers for specific Michigan communities. Detroit leads with an estimated 14,000 birds passing directly over the city, followed by Grand Rapids at 6,700 and Warren at 3,100. These numbers represent birds actively in flight overhead during the peak overnight migration window across the state.
Most of these birds will be in flight while residents sleep, guided by stars, the earth’s magnetic field, and sounds as they navigate northward during their annual spring migration across the Great Lakes region.
Lights Out Alert Active From 11 PM to 6 AM
A Lights Out Alert has been issued across all of Michigan for the peak migration nights, urging residents to dim or turn off any non-essential outdoor lighting between 11 PM and 6 AM. Artificial lights from buildings, homes, and urban areas can disorient migrating birds during nighttime flight, causing them to circle lit areas in confusion and increasing the risk of fatal building collisions.
Turning off porch lights, decorative outdoor lighting, and any other non-essential exterior illumination during the overnight hours is one of the simplest and most impactful things Michigan residents can do to support the safe passage of millions of birds through the state this week. Stay with NapervilleLocal.com for the latest weather updates and local forecast coverage.
I’ve lived in Naperville long enough to see how quickly our community changes — from new developments downtown to sudden shifts in our Midwest weather. Reporting on Naperville news and daily forecasts gives me the chance to keep neighbors informed about what really matters. My goal is simple: deliver clear, timely updates so you always know what’s happening in our city and what to expect from the skies above.